Cisco uBR7200 Router Release Notes for
Cisco IOS Release 12.2(33)SCB
June 20, 2011
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CONTENTS
CHAPTER
1
Introduction
1-1
Inheritance Information
1-1
System Requirements 1-2
Memory Requirements 1-2
Hardware Supported 1-3
Platforms Supported 1-3
Cable Interface Line Cards Supported 1-3
Cisco uBR7200 Series Universal Broadband Router Port Adapters Supported 1-4
Verifying the Software Version 1-6
Upgrading to a New Software Release 1-6
Upgrading to Cisco IOS Release 12.2(33)SCA on a Cisco uBR7246VXR Universal Broadband
Router 1-6
Feature Support 1-7
Cisco CMTS User Documentation References for Cisco IOS Release 12.2SC 1-7
Cisco Feature Navigator 1-8
New and Changed Information 1-9
New Hardware Features in Cisco IOS Release 12.2(33)SCB11 1-11
New Hardware Features in Cisco IOS Release 12.2(33)SCB10 1-11
New Hardware Features in Cisco IOS Release 12.2(33)SCB9 1-11
New Hardware Features in Cisco IOS Release 12.2(33)SCB8 1-11
New Hardware Features in Cisco IOS Release 12.2(33)SCB7 1-11
New Hardware Features in Cisco IOS Release 12.2(33)SCB6 1-11
New Hardware Features in Cisco IOS Release 12.2(33)SCB5 1-11
New Hardware Features in Cisco IOS Release 12.2(33)SCB4 1-11
New Hardware Features in Cisco IOS Release 12.2(33)SCB3 1-11
New Hardware Features in Cisco IOS Release 12.2(33)SCB2 1-11
New Hardware Features in Cisco IOS Release 12.2(33)SCB1 1-12
New Hardware Features in Cisco IOS Release 12.2(33)SCB 1-12
NPE-G2 Processor on the Cisco uBR7225VXR Router 1-12
New Software Features in Cisco IOS Release 12.2(33)SCB11 1-12
Modified Software Features in Cisco IOS Release 12.2(33)SCB11 1-12
New Software Features in Cisco IOS Release 12.2(33)SCB10 1-12
IPv6 Support on Multiple Subinterfaces 1-12
Suppressing Downstream and Upstream Peak Rate TLVs for pre DOCSIS 3.0 Cable
Modems 1-12
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
1
Contents
Modified Software Features in Cisco IOS Release 12.2(33)SCB10 1-13
New Software Features in Cisco IOS Release 12.2(33)SCB9 1-13
Modified Software Features in Cisco IOS Release 12.2(33)SCB9 1-13
New Software Features in Cisco IOS Release 12.2(33)SCB8 1-13
Modified Software Features in Cisco IOS Release 12.2(33)SCB8 1-13
New Software Features in Cisco IOS Release 12.2(33)SCB7 1-13
Modified Software Features in Cisco IOS Release 12.2(33)SCB7 1-13
New Software Features in Cisco IOS Release 12.2(33)SCB6 1-13
Modified Software Features in Cisco IOS Release 12.2(33)SCB6 1-13
New Software Features in Cisco IOS Release 12.2(33)SCB5 1-14
Modified Software Features in Cisco IOS Release 12.2(33)SCB5 1-14
New Software Features in Cisco IOS Release 12.2(33)SCB4 1-14
Direct Load for Cable Modems 1-14
Adding DSG Tunnel Group to a Subinterface 1-14
Modified Software Features in Cisco IOS Release 12.2(33)SCB4 1-15
CM Steering Enhancement 1-15
New Software Features in Cisco IOS Release 12.2(33)SCB3 1-15
Modified Software Features in Cisco IOS Release 12.2(33)SCB3 1-15
New Software Features in Cisco IOS Release 12.2(33)SCB2 1-15
Modified Software Features in Cisco IOS Release 12.2(33)SCB2 1-15
New Software Features in Cisco IOS Release 12.2(33)SCB1 1-15
Enhanced Show Tech 1-15
Cable Modem QoS Information 1-16
SAMIS CLC-RP Traffic Throttling 1-16
Modified Software Features in Cisco IOS Release 12.2(33)SCB1 1-16
New Software Features in Cisco IOS Release 12.2(33)SCB 1-16
Bypass the 24 Hour Timer for WB CM Use of Failed RF Channels 1-17
CM Steering 1-17
CMTS IPDR/SP 1-17
DOCSIS 3.0 Multicast Support 1-18
Dynamic Service Transaction ID Allocation 1-19
IGMP-Triggered VDOC Broadcast Support 1-19
IP SLAs—Random Scheduler 1-19
IP SLAs—Additional Threshold Traps 1-19
IP SLAs—Proactive Threshold Monitoring of IP SLAs Operations 1-20
IP SLAs—Analyzing IP Service Levels Using the UDP Jitter Operation 1-20
IP SLAs—Analyzing VoIP Service Levels Using the UDP Jitter Operation 1-20
IP SLAs—Analyzing IP Service Levels Using the TCP Connect Operation 1-20
IP SLAs—Scheduler 1-20
IP SLAs—Proactive Threshold Monitoring of IP SLAs Operations 1-20
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
2
Contents
IP SLAs—One Way Measurement 1-20
IP SLAs—Multioperation Scheduling of IP SLAs Operations 1-20
IP SLAs—MPLS VPN Awareness 1-20
IP SLAs—Analyzing IP Service Levels Using the ICMP Path Echo Operation
IP SLAs—Analyzing IP Service Levels Using the HTTP Operation 1-21
IP SLAs—Analyzing IP Service levels Using the FTP Operation 1-21
IP SLAs—Analyzing IP Service Levels Using the DNS Operation 1-21
IP SLAs—Distribution of Statistics 1-21
IP SLAs—Analyzing IP Service Levels Using the DHCP Operation 1-21
IP SLAs—CLI Phase 3 1-21
Load Balancing Prohibition Based on Group Policy ID 1-21
RSVP-Based Video on Demand Support over DOCSIS 1-22
Subscriber Management Packet Filtering for DOCSIS 2.0 1-22
Subscriber ID Support for Packetcable 1-22
Subscriber Traffic Management Version 1.2 1-23
Upstream Utilization Optimization 1-24
Modified Software Features in Cisco IOS Release 12.2(33)SCB 1-24
MIBs 1-25
New and Changed MIB Information in Cisco IOS Release 12.2(33)SCB
1-21
1-25
Limitations and Restrictions 1-25
Unsupported Hardware 1-25
Software Feature Restrictions 1-26
DOCSIS 1-26
MIBs Restriction 1-26
PacketCable 1-26
PXF 1-26
Redundancy 1-26
Wideband 1-27
Important Notes
1-27
Obtaining Documentation and Submitting a Service Request
CHAPTER
2
1-28
Caveat List for Cisco IOS Release 12.2(33)SCB 2-1
Cisco Bug Search 2-1
Open Caveats—Cisco IOS Release 12.2(33)SCB11 2-2
Resolved Caveats—Cisco IOS Release 12.2(33)SCB11 2-2
Open Caveats—Cisco IOS Release 12.2(33)SCB10 2-3
Resolved Caveats—Cisco IOS Release 12.2(33)SCB10 2-3
Open Caveats—Cisco IOS Release 12.2(33)SCB9 2-5
Resolved Caveats—Cisco IOS Release 12.2(33)SCB9 2-5
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
3
Contents
Open Caveats—Cisco IOS Release 12.2(33)SCB8 2-5
Resolved Caveats — Cisco IOS Release 12.2(33)SCB8 2-6
Open Caveats—Cisco IOS Release 12.2(33)SCB7 2-6
Resolved Caveats—Cisco IOS Release 12.2(33)SCB7 2-7
Open Caveats—Cisco IOS Release 12.2(33)SCB6 2-10
Resolved Caveats—Cisco IOS Release 12.2(33)SCB6 2-15
Open Caveats—Cisco IOS Release 12.2(33)SCB5 2-15
Resolved Caveats—Cisco IOS Release 12.2(33)SCB5 2-20
Open Caveats—Cisco IOS Release 12.2(33)SCB4 2-24
Resolved Caveats—Cisco IOS Releases 12.2(33)SCB4 2-29
Open Caveats—Cisco IOS Release12.2(33)SCB3 2-32
Resolved Caveats—Cisco IOS Release 12.2(33)SCB3 2-37
Open Caveats—Cisco IOS Release 12.2(33)SCB2 2-41
Resolved Caveats—Cisco IOS Release12.2(33)SCB2 2-43
Open Caveats—Cisco IOS Release 12.2(33)SCB1 2-44
Resolved Caveats—Cisco IOS Release 12.2(33)SCB1 2-46
Open Caveats —Cisco IOS Release 12.2(33)SCB 2-48
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
4
CH A P T E R
1
Introduction
This document contains information about downloading and installing Cisco IOS Release 12.2(33)SCB.
It also provides new and changed information, hardware support, limitations and restrictions, and
caveats for Cisco IOS Release 12.2(33)SCB.
For software caveats that apply to the Cisco IOS Release 12.2(33)SCB on the Cisco uBR10012 routers,
see the corresponding release notes for Cisco uBR10012 Routers.
We recommend that you view the field notices for this release to see if your software or hardware
platforms are affected. If you have an account on Cisco.com, you can find field notices at
http://www.cisco.com/en/US/customer/support/tsd_products_field_notice_summary.html.
If you do not have a Cisco.com login account, you can find field notices at
http://www.cisco.com/en/US/support/tsd_products_field_notice_summary.html.
This chapter includes the following sections:
•
Inheritance Information, page 1-1
•
System Requirements, page 1-2
•
New and Changed Information, page 1-9
•
MIBs, page 1-25
•
Limitations and Restrictions, page 1-25
•
Important Notes, page 1-27
•
Obtaining Documentation and Submitting a Service Request, page 1-28
Inheritance Information
This section describes the related Cisco IOS software releases that are part of the Cisco IOS Release
12.2SC train.
SCA-based releases
•
Prior Cisco IOS 12.2SCA releases
•
Cisco IOS Release 12.3(21)BC
•
Cisco IOS Release 12.2(31)SB (which is based on Cisco IOS Release 12.2(25)S and includes many
features from Cisco IOS Release 12.2T)
•
Cisco IOS Release 12.2(33)SRC
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
1-1
Chapter 1
Introduction
System Requirements
SCB-based releases
•
Prior Cisco IOS 12.2SCA releases
•
Cisco IOS Release 12.3(21)BC
•
Cisco IOS Release 12.3(23)BC
•
Cisco IOS Release 12.2(33)SB
•
Cisco IOS Release 12.2(33)SRC
System Requirements
These sections describe the system requirements for Cisco IOS Release 12.2(33)SCB:
•
Memory Requirements, page 1-2
•
Hardware Supported, page 1-3
•
Verifying the Software Version, page 1-6
•
Upgrading to a New Software Release, page 1-6
•
Feature Support, page 1-7
Memory Requirements
This section describes the memory requirements for Cisco IOS Release 12.2(33)SCB.
Table 1 displays the memory recommendations for the Cisco uBR7200 series universal broadband
routers with Cisco IOS Release 12.2SC feature sets. Cisco uBR7200 series routers are only available
with 48 MB or 128 MB of flash memory on the I/O Controller cards. The UBR7200-NPE-G1 and
NPE-G2 use FlashDisks only.
Note
Table 1
FlashDisks, an alternative to linear flash memory, are flash memory-based devices that can be used as
file storage media in the PCMCIA card slots of the I/O controllers. Each I/O Controller has two PCMCIA
slots and can be configured with up to 256 MB of FlashDisk memory.
Memory Recommendations for the Cisco uBR7200 Series Routers
Feature Set
Software Image
Two-Way Data/VoIP Images (NPE-G1 and NPE-G2)
Recommended
Flash Memory
Recommended
DRAM Memory
Runs From
DOCSIS 2-Way 3DES for
Cisco NPE-G1
ubr7200-jk9su2
48 MB
512 MB DRAM
RAM
DOCSIS 2-Way 3DES for
Cisco NPE-G2
Boot Image
ubr7200p-jk9su2
128 MB
1 GB DRAM
RAM
UBR7200 Boot Image
ubr7200-kboot-mz
None
None
—
UBR7200 NPE-G2 Boot Image
ubr7200p-kboot-mz
None
None
—
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
1-2
Chapter 1
Introduction
System Requirements
The image subset legend for Table 1 is as follows:
•
j—IP routing, MPLS-VPN support, and non-cable interface bridging, including Network Address
Translation (NAT)
•
k9—AES/DES level of encryption. Greater than 64-bit encryption (on 12.2 and up)
•
s—“Plus” features: NAT and Inter-Switch Link (ISL)
Hardware Supported
The following sections list the hardware supported on various Cisco IOS Releases:
•
Platforms Supported, page 1-3
•
Cable Interface Line Cards Supported, page 1-3
•
Cisco uBR7200 Series Universal Broadband Router Port Adapters Supported, page 1-4
Platforms Supported
Table 2 provides information about the CMTS router platforms and processors supported in Cisco IOS
Release 12.2(33)SCB.
Table 2
Platforms Supported in Cisco IOS Release 12.2(33)SCB
Processor
Engine
Platform
Minimum Cisco IOS Release
Cisco uBR7246VXR Universal Broadband NPE-G1 and
Router
NPE-G2
Cisco IOS Release 12.2(33)SCA
Cisco uBR7225VXR Universal Broadband NPE-G1 only Cisco IOS Release 12.2(33)SCA
Router
NPE-G1 and Cisco IOS Release 12.2(33)SCB and
NPE-G2
later
Cable Interface Line Cards Supported
Table 3 provides information about the cable interface line cards supported in
Cisco IOS Release 12.2(33)SCB.
Table 3
Cable Interface Line Cards Supported in Cisco IOS Release 12.2(33)SCB
Platform
Supported Cable Interface Line Cards
Cisco uBR7246VXR universal broadband router
Cisco IOS Release 12.2(33)SCA and later
Cisco uBR7225VXR universal broadband router
•
Cisco uBR-MC28U/X—maximum 4
•
Cisco uBR-MC16U/X—maximum 4
Cisco IOS Release 12.2(33)SCA and later
•
Cisco uBR-E-28U—maximum 2
•
Cisco uBR-E-16U—maximum 2
•
Cisco uBR-MC28U/X—maximum 2
•
Cisco uBR-MC16U/X—maximum 2
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
1-3
Chapter 1
Introduction
System Requirements
OIR of Cable Interface Line Cards on the Cisco uBR7200 Universal Broadband Router
The Cisco uBR7200 series universal broadband routers support online insertion and removal (OIR) or
“hot swapping” of cable interface line cards only when exchanging cable interface line cards of the exact
type. For example, exchanging a Cisco uBR-MC28U card for another Cisco uBR-MC28U line card.
Under these conditions, no reload of the router is required.
Caution
When you perform OIR of different types of cable interface line cards (for example, a
Cisco uBR-MC16U line card replaced by a Cisco uBR-MC16X line card, Cisco uBR-MC16U line card
replaced by a Cisco uBR-MC28U line card, or Cisco uBR-MC28U line card replaced by a
Cisco uBR-MC88V cable interface line card), you might not only have to reconfigure the interfaces, but
also reload the router (recommended).
Cisco uBR7200 Series Universal Broadband Router Port Adapters Supported
Table 4 provides information about the maximum number of port adapters (PA) supported on the
Cisco uBR7200 series universal broadband routers:
Table 4
Number of Port Adapters Supported in Cisco uBR7200 Series Universal Broadband
Routers
Platform
Cisco uBR7246VXR universal
broadband router
Port Adapters—Maximum
Number
Minimum Cisco IOS Release
See Table 5; maximum 2
Cisco IOS Release 12.2(33)SCA
Table 5 provides information about the port adapters supported by the Cisco uBR7200 series universal
broadband routers in Cisco IOS Release 12.2SC and uses the following conventions:
•
Yes—The port adapter is supported in the software image.
•
No—The port adapter is not supported in the software image.
•
In—The “Release” column indicates the release of the Cisco IOS Release 12.2SB when the port
adapter was introduced. If a cell in this column contains an em dash (—), it indicates that:
– Support for the port adapter was inherited from Cisco IOS Release 12.2 or from another release.
– Support for the port adapter was included in the initial base release of
Cisco IOS Release 12.2SC.
Table 5
Port Adapters Supported for the Cisco uBR7200 Series Universal Broadband Routers
Adapter Description
Cisco IOS
Release
Cisco
uBR7246VXR
PA-A3-OC3MM
1-port ATM Enhanced OC3c/STM1 multimode
—
No
PA-A3-OC3SMI
1-port ATM Enhanced OC3c/STM1 single mode (IR)
—
No
PA-A3-OC3SML
1-port ATM Enhanced OC3c/STM1 single mode (LR)
—
No
PA-A3-OC12MM
1-port ATM Enhanced OC12/STM4 multimode
—
No
PA-A3-OC12SMI
1-port ATM Enhanced OC12/STM4 single mode (IR)
—
No
PA-A3-E3
1-port ATM Enhanced E3
—
No
Cisco Product Number1
ATM Port Adapters
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
1-4
Chapter 1
Introduction
System Requirements
Table 5
Port Adapters Supported for the Cisco uBR7200 Series Universal Broadband Routers (continued)
Cisco Product Number1
Adapter Description
Cisco IOS
Release
Cisco
uBR7246VXR
PA-A3-T3
1-port ATM Enhanced DS3
—
No
PA-A3-8E1IMA
8-port ATM Inverse Mux E1, 120 ohms
—
No
PA-A3-8T1IMA
8-port ATM Inverse Mux T1
—
No
PA-A6-OC3MM
1-port ATM OC-3c/STM-1 multimode, enhanced
12.2(28)SB
Yes
PA-A6-OC3SML
1-port ATM OC-3c/STM-1 single-mode (LR), enhanced
12.2(28)SB
Yes
PA-A6-E3
1-port ATM E3, enhanced
12.2(28)SB
No
PA-A6-T3
1-port ATM DS3, enhanced
12.2(28)SB
Yes
Fast Ethernet/Gigabit Ethernet Port Adapters
PA-4E
4-port Ethernet 10BASE-T
—
No
PA-2FE-FX
2-port Fast Ethernet 100BASE-FX
—
Yes
PA-2FE-TX
2-port Fast Ethernet 100BASE-TX
—
Yes
PA-GE
1-port Gigabit Ethernet
—
Yes
—
No
High-Speed Serial Port Adapters
PA-2H
2-port High-Speed Serial Interface (HSSI)
Multichannel Serial Port Adapters
PA-MC-T3-EC
1-port multichannel T3 enhanced capability
—
Yes
PA-MC-T3
1-port multichannel T3
—
No
PA-MC-E3
1-port multichannel E3
—
No
PA-MC-2T3+
2-port multichannel T3
—
No
PA-MC-2E1/120
2-port multichannel E1, G.703 120-ohm interface
—
No
PA-MC-4T1
4-port multichannel T1, integrated CSU/DSUs
—
No
PA-MC-8TE1+
8-port multichannel T1/E1 8PRI
—
No
PA-MC-STM-1MM
1-port multichannel STM-1 multimode
—
No
PA-MC-STM-1SMI
1-port multichannel STM-1 single mode
—
No
PA-4B-U
4-port BRI, U Interface
—
No
PA-8B-S/T
8-port BRI, S/T Interface
—
No
PA-POS-OC3SMI
1-port Packet over SONET OC3c/STM1 single mode (IR) —
No
PA-POS-1OC3
1-port OC-3/STM-1 POS (with APS)
12.2(28)SB6
Yes
PA-POS-2OC3
2-port OC-3/STM-1 POS (with APS)
—
Yes
PA-4T+
4-port Serial, Enhanced
—
Yes
PA-8T-V35
8-port Serial, V.35
—
No
SONET Port Adapters
T1/E1 Port Adapters
T3/E3 Port Adapters
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
1-5
Chapter 1
Introduction
System Requirements
Table 5
Port Adapters Supported for the Cisco uBR7200 Series Universal Broadband Routers (continued)
Cisco Product Number1
Adapter Description
Cisco IOS
Release
Cisco
uBR7246VXR
PA-T3+
1-port T3 Serial, Enhanced
12.2(x)SB
Yes
PA-2T3+
2-port T3 Serial, Enhanced
12.2(x)SB
Yes
PA-E3
1-port E3 Serial, E3 DSUs
—
No
PA-2E3
2-port E3 Serial, E3 DSUs
12.2(x)SB
Yes
1. For a spare product number, append an equal sign (=) to the product number. If a product number is listed as a spare product in the table, that is, with
an equal sign (=), it means that the product is only available as a spare product.
Verifying the Software Version
To verify the version of the Cisco IOS software running on your Cisco universal broadband router, log
in to the router and enter the show version EXEC command:
Router# show version
Cisco IOS Software, 7200 Software (UBR7200P-JK9SU2-M), Version 12.2(32.7.9)SCB
EXPERIMENTAL IMAGE ENGINEERING C10K_WEEKLY BUILD, synced to
MAYFLOWER_BASE_FOR_V122_33_SB_THROTTLE
Copyright (c) 1986-2009 by Cisco Systems, Inc.
ROM: System Bootstrap, Version 12.4(12.2r)T, RELEASE SOFTWARE (fc1)
Upgrading to a New Software Release
For information about selecting a new Cisco IOS software release, see "How to Choose a
Cisco IOS Software Release" at the following location:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1834/products_tech_note09186a00800fb9d9.sht
ml
For information about upgrading the Cisco universal broadband routers, see the Software Installation
and Upgrade Procedures document at the following location:
http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a0080094c07.shtml
For Cisco IOS upgrade ordering instructions, see the document at the following location:
http://www.cisco.com/warp/public/cc/pd/iosw/prodlit/957_pp.htm
Upgrading to Cisco IOS Release 12.2(33)SCA on a Cisco uBR7246VXR Universal Broadband Router
A cold start of the router is recommended for an upgrade to Cisco IOS Release 12.2(33)SCA from a
different release train on a Cisco uBR7246VXR router, such as Cisco IOS Release12.3(23)BC or other
Cisco IOS BC releases.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
1-6
Chapter 1
Introduction
System Requirements
Feature Support
Cisco IOS software is packaged in feature sets that consist of software images that support specific
platforms. The feature sets available for a specific platform depend on which Cisco IOS software images
are included in a release. Each feature set contains a specific set of Cisco IOS features.
Caution
Cisco IOS images with strong encryption (including, but not limited to 168-bit [3DES] data encryption
feature sets) are subject to U.S. government export controls and have limited distribution. Strong
encryption images to be installed outside the United States are likely to require an export license.
Customer orders may be denied or subject to delay because of U.S. government regulations. When
applicable, the purchaser or user must obtain local import and use authorizations for all encryption
strengths. Please contact your sales representative or distributor for more information, or send an e-mail
to [email protected].
Cisco CMTS User Documentation References for Cisco IOS Release 12.2SC
The table below provides information about important user documents in Cisco IOS Release 12.2SC.
Table 1-6
Important User Documents in Cisco IOS Release 12.2SC
Guide
Description
Documentation Roadmap
Describes a set of Cisco CMTS documents and contains links to the referenced
documents.
Go to the following link to access this document:
http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/roadmap/7200rdmp.html
Command Reference
Provides information about the software commands used to configure a Cisco CMTS.
Includes command syntax, default value, value range, command mode, usage guidelines,
and examples.
Go to the following link to access this document:
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_book.html
Design Guides
Describes how to plan, install, and configure a Cisco CMTS. Contains information about
the supported technologies, interfaces and protocols and can also contain special
installation considerations, network diagrams, example applications, system design, and
environmental recommendations.
Go to the following link to access this document set:
http://www.cisco.com/en/US/products/hw/cable/ps2217/
tsd_products_support_design_technotes_list.html
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 1
Introduction
System Requirements
Guide
Description
Install and Upgrade Guides
Provides step-by-step instructions for installing or upgrading a Cisco CMTS. Also
includes line card installation guides, shipping documents, safety information, and
quick-start guides for experienced users.
Go to the following link to access this document set:
http://www.cisco.com/en/US/products/hw/cable/ps2217/
prod_installation_guides_list.html
Important guides in this section are:
Configuration Guides
•
Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide
•
Upgrading to the Cisco uBR7246 VXR Universal Broadband Router
Contains detailed, step-by-step instructions for configuring a Cisco CMTS, including
software feature guides, configuration examples, network diagrams, and technical
concepts.
Go to the following link to access this document:
•
Error and System Messages
Cisco IOS CMTS Cable Software Configuration Guide, Release 12.2SC
Lists error and system messages for a Cisco CMTS, including any recommended user
action for each message.
Go to the following link to access this document:
http://www.cisco.com/en/US/docs/cable/cmts/system/message/uberrmes.html
Troubleshooting Guides
Provides problem-solving techniques for a Cisco CMTS, including methods to identify
problems based on symptoms and recommended actions for resolution.
Go to the following link to access this document set:
http://www.cisco.com/en/US/products/hw/cable/ps2217/
prod_troubleshooting_guides_list.html
Cisco Feature Navigator
The Cisco Feature Navigator is a web-based tool that enables you to determine which Cisco IOS
software images support a specific set of features and which features are supported in a specific Cisco
IOS image. You can search by feature or by feature set (software image). Under the release section, you
can compare Cisco IOS software releases side-by-side to display both the features unique to each
software release and the features that the releases have in common.
To access the Cisco Feature Navigator, you must have an account on Cisco.com. If you have forgotten
or lost your account information, send a blank e-mail to [email protected]. An automatic check
verifies that your e-mail address is registered with Cisco.com. If the check is successful, account details
with a new random password is e-mailed to you. Qualified users can establish an account on Cisco.com
by following the directions found at this URL:
https://tools.cisco.com/RPF/register/register.do
The Cisco Feature Navigator is updated regularly when major Cisco IOS software releases and
technology releases occur. For the most current information, go to the Cisco Feature Navigator home
page at the following URL:
http://www.cisco.com/go/fn
For frequently asked questions about the Cisco Feature Navigator, see the FAQs at the following URL:
http://www.cisco.com/support/FeatureNav/FNFAQ.html
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 1
Introduction
New and Changed Information
Determining Which Software Images Support a Specific Feature
To identify the software images (feature sets) in Cisco IOS Release 12.2(33)SC that support a specific
feature:
Step 1
Go to the Cisco Feature Navigator home page. Enter your Cisco.com login.
Step 2
Click Search by Feature.
Step 3
To find a feature, use either Filter by full or partial feature name or search for available features in
alphabetical order. Either a list of features that match the search criteria or a list of features that begin
with the number or letter selected from the ordered list is displayed in the text box.
Step 4
Select a feature from the Available Features pane, and click Add to add a feature to the Selected Features
pane.
Note
To learn more about a feature in the list, click Show Descriptions.
Repeat this step to add additional features. A maximum of 20 features can be chosen for a single search.
Step 5
Click Continue when you are finished selecting features.
Step 6
From the Major Release drop-down menu, choose 12.2SC.
Step 7
From the Release drop-down menu, choose the appropriate maintenance release.
Step 8
From the Platform Family drop-down menu, select the appropriate hardware platform. The Search
Results table lists all the software images (feature sets) that support the selected feature.
Determining Which Features Are Supported in a Specific Software Image
To determine the features supported in a specific software image (feature set) in
Cisco IOS Release 12.2(33)SC:
Step 1
Go to the Cisco Feature Navigator home page. Enter your Cisco.com login.
Step 2
Click Compare Images.
Step 3
From the Software drop-down menu in the Select First Image Parameters pane, choose IOS.
Step 4
From the Major Release drop-down menu, choose 12.2SC.
Step 5
From the Release Number drop-down menu, choose the appropriate maintenance release.
Step 6
From the Platform Family drop-down menu, choose the appropriate hardware platform.
Step 7
From the Feature Set drop-down menu, choose the appropriate feature set. The Search Results table lists
all the features that are supported by the selected feature set (software image).
New and Changed Information
The following sections list the new and modified hardware and software features supported on the
Cisco uBR7200 routers in Cisco IOS Release 12.2(33)SCB:
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 1
New and Changed Information
•
New Hardware Features in Cisco IOS Release 12.2(33)SCB11, page 1-11
•
New Hardware Features in Cisco IOS Release 12.2(33)SCB10, page 1-11
•
New Hardware Features in Cisco IOS Release 12.2(33)SCB9, page 1-11
•
New Hardware Features in Cisco IOS Release 12.2(33)SCB8, page 1-11
•
New Hardware Features in Cisco IOS Release 12.2(33)SCB7, page 1-11
•
New Hardware Features in Cisco IOS Release 12.2(33)SCB6, page 1-11
•
New Hardware Features in Cisco IOS Release 12.2(33)SCB5, page 1-11
•
New Hardware Features in Cisco IOS Release 12.2(33)SCB4, page 1-11
•
New Hardware Features in Cisco IOS Release 12.2(33)SCB3, page 1-11
•
New Hardware Features in Cisco IOS Release 12.2(33)SCB2, page 1-11
•
New Hardware Features in Cisco IOS Release 12.2(33)SCB1, page 1-12
•
New Hardware Features in Cisco IOS Release 12.2(33)SCB, page 1-12
•
New Software Features in Cisco IOS Release 12.2(33)SCB11, page 1-12
•
Modified Software Features in Cisco IOS Release 12.2(33)SCB11, page 1-12
•
New Software Features in Cisco IOS Release 12.2(33)SCB10, page 1-12
•
Modified Software Features in Cisco IOS Release 12.2(33)SCB10, page 1-13
•
New Software Features in Cisco IOS Release 12.2(33)SCB9, page 1-13
•
Modified Software Features in Cisco IOS Release 12.2(33)SCB9, page 1-13
•
New Software Features in Cisco IOS Release 12.2(33)SCB8, page 1-13
•
Modified Software Features in Cisco IOS Release 12.2(33)SCB8, page 1-13
•
New Software Features in Cisco IOS Release 12.2(33)SCB7, page 1-13
•
Modified Software Features in Cisco IOS Release 12.2(33)SCB7, page 1-13
•
New Software Features in Cisco IOS Release 12.2(33)SCB6, page 1-13
•
Modified Software Features in Cisco IOS Release 12.2(33)SCB6, page 1-13
•
New Software Features in Cisco IOS Release 12.2(33)SCB5, page 1-14
•
Modified Software Features in Cisco IOS Release 12.2(33)SCB5, page 1-14
•
New Software Features in Cisco IOS Release 12.2(33)SCB4, page 1-14
•
Modified Software Features in Cisco IOS Release 12.2(33)SCB4, page 1-15
•
New Software Features in Cisco IOS Release 12.2(33)SCB3, page 1-15
•
Modified Software Features in Cisco IOS Release 12.2(33)SCB3, page 1-15
•
New Software Features in Cisco IOS Release 12.2(33)SCB2, page 1-15
•
Modified Software Features in Cisco IOS Release 12.2(33)SCB2, page 1-15
•
New Software Features in Cisco IOS Release 12.2(33)SCB1, page 1-15
•
Modified Software Features in Cisco IOS Release 12.2(33)SCB1, page 1-16
•
New Software Features in Cisco IOS Release 12.2(33)SCB, page 1-16
•
Modified Software Features in Cisco IOS Release 12.2(33)SCB, page 1-24
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Introduction
Chapter 1
Introduction
New and Changed Information
New Hardware Features in Cisco IOS Release 12.2(33)SCB11
There are no new hardware features in Cisco IOS Release 12.2(33)SCB11.
New Hardware Features in Cisco IOS Release 12.2(33)SCB10
There are no new hardware features in Cisco IOS Release 12.2(33)SCB10.
New Hardware Features in Cisco IOS Release 12.2(33)SCB9
There are no new hardware features in Cisco IOS Release 12.2(33)SCB9.
New Hardware Features in Cisco IOS Release 12.2(33)SCB8
There are no new hardware features in Cisco IOS Release 12.2(33)SCB8.
New Hardware Features in Cisco IOS Release 12.2(33)SCB7
There are no new hardware features in Cisco IOS Release 12.2(33)SCB7.
New Hardware Features in Cisco IOS Release 12.2(33)SCB6
There are no new hardware features in Cisco IOS Release 12.2(33)SCB6.
New Hardware Features in Cisco IOS Release 12.2(33)SCB5
There are no new hardware features in Cisco IOS Release 12.2(33)SCB5.
New Hardware Features in Cisco IOS Release 12.2(33)SCB4
There are no new hardware features in Cisco IOS Release 12.2(33)SCB4.
New Hardware Features in Cisco IOS Release 12.2(33)SCB3
There are no new hardware features in Cisco IOS Release 12.2(33)SCB3.
New Hardware Features in Cisco IOS Release 12.2(33)SCB2
There are no new hardware features in Cisco IOS Release 12.2(33)SCB2.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 1
Introduction
New and Changed Information
New Hardware Features in Cisco IOS Release 12.2(33)SCB1
There are no new hardware features in Cisco IOS Release 12.2(33)SCB1.
New Hardware Features in Cisco IOS Release 12.2(33)SCB
This section describes the hardware feature supported in Cisco IOS 12.2(33)SCB.
NPE-G2 Processor on the Cisco uBR7225VXR Router
See
http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/ubr7225vxr/installation/guide/ub7225prod.html
#wp1026827 for more information.
New Software Features in Cisco IOS Release 12.2(33)SCB11
There are no new software features in Cisco IOS Release 12.2(33)SCB11.
Modified Software Features in Cisco IOS Release 12.2(33)SCB11
There are no modified software features in Cisco IOS Release 12.2(33)SCB11.
New Software Features in Cisco IOS Release 12.2(33)SCB10
This section lists the new features in Cisco IOS Release 12.2(33)SCB10. Some features may be new to
Cisco IOS Release 12.2(33)SCB10 but were released in earlier Cisco IOS software releases.
IPv6 Support on Multiple Subinterfaces
Starting with Cisco IOS Release 12.2(33)SCB10, IPv6 commands are supported on multiple CMTS
bundle subinterfaces.
For more details on this feature, refer to the IPv6 on Cable feature document at the following location:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_ipv6.html#wp1077229
Suppressing Downstream and Upstream Peak Rate TLVs for pre DOCSIS 3.0 Cable Modems
The DOCSIS 3.0 upstream (US) peak rate TLV 24.27 and downstream (DS) peak rate TLV 25.27 are
enabled on the Cisco CMTS through the cable service class command or the CM configuration file. The
DOCSIS 1.x and DOCSIS 2.0 CMs do not support these TLVs. Ideally, if a DOCSIS 1.x or DOCSIS 2.0
CM receives peak rate TLVs during registration, it should ignore these TLVs and proceed with the
registration. However there are a few old non-compliant pre DOCSIS 3.0 CMs, which may fail to come
online when peak-rate TLVs are received in the registration response from the Cisco CMTS. To
overcome this, the Cisco CMTS has introduced this feature which allows you to suppress sending of
DOCSIS 3.0 peak rate TLVs to the pre DOCSIS 3.0 CMs.
The following command was introduced:
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 1
Introduction
New and Changed Information
•
cable service attribute withhold-TLV
For more details on this feature, refer to the DOCSIS 1.1 for the Cisco CMTS Routers at the following
location:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_docsis11.html
Modified Software Features in Cisco IOS Release 12.2(33)SCB10
There are no modified software features in Cisco IOS Release 12.2(33)SCB10.
New Software Features in Cisco IOS Release 12.2(33)SCB9
There are no new software features in Cisco IOS Release 12.2(33)SCB9.
Modified Software Features in Cisco IOS Release 12.2(33)SCB9
There are no modified software features in Cisco IOS Release 12.2(33)SCB9.
New Software Features in Cisco IOS Release 12.2(33)SCB8
There are no new software features in Cisco IOS Release 12.2(33)SCB8.
Modified Software Features in Cisco IOS Release 12.2(33)SCB8
There are no modified software features in Cisco IOS Release 12.2(33)SCB8.
New Software Features in Cisco IOS Release 12.2(33)SCB7
There are no new software features in Cisco IOS Release 12.2(33)SCB7.
Modified Software Features in Cisco IOS Release 12.2(33)SCB7
There are no modified software features in Cisco IOS Release 12.2(33)SCB7.
New Software Features in Cisco IOS Release 12.2(33)SCB6
There are no new software features in Cisco IOS Release 12.2(33)SCB6.
Modified Software Features in Cisco IOS Release 12.2(33)SCB6
There are no modified software features in Cisco IOS Release 12.2(33)SCB6.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 1
Introduction
New and Changed Information
New Software Features in Cisco IOS Release 12.2(33)SCB5
There are no new features supported in Cisco IOS Release 12.2(33)SCB5.
Modified Software Features in Cisco IOS Release 12.2(33)SCB5
There are no modified features supported in Cisco IOS Release 12.2(33)SCB5.
New Software Features in Cisco IOS Release 12.2(33)SCB4
This section describes the new cable software features in Cisco IOS Release 12.2(33)SCB4. Some
features may be new to Cisco IOS Release 12.2(33)SCB4 but were released in earlier Cisco IOS software
releases. Some features may have been released in earlier Cisco IOS software releases and have been
changed in Cisco IOS Release 12.2(33)SCB4. To determine if a feature is new or changed, see the feature
history table at the beginning of the feature module for that feature. Links to feature modules are
included below. If a feature listed below does not have a link to a feature module, that feature is
documented only in the release notes, and information about whether the feature is new or changed will
be available in the feature description provided below.
The show interface cable dsg downstream dcd command output is modified to display the DOCSIS
Set-top Gateway (DSG) Downstream Channel Descriptor (DCD) messages for all interfaces in the MAC
domain.
For more information, refer
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_18_show_d_to_show_i.html#wp1
148747
Direct Load for Cable Modems
A new command, cable upstream equalization-error-recovery, is introduced to enable the CMTS to
send type, length, value (TLV) Type 9 in the DOCSIS ranging response (RNG-RSP) MAC management
messages. The TLV Type 9 helps CMs to come online if the TLV Type 4 convolved method causes CMs
to go offline.
For details about this command, see the Cisco IOS CMTS Cable Command Reference at the following
URL:
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_10_cable_u_to_cable_w.html
Adding DSG Tunnel Group to a Subinterface
Cisco IOS Release 12.2(33)SCB4 introduces the option to add a DOCSIS Set-Top Gateway (DSG)
tunnel-group to a subinterface using the cable dsg tg command. After adding the DSG tunnel-group to
a subinterface using cable dsg tg command, appropriate IP Internet Group Management Protocol
(IGMP) static joins are created and forwarding of DSG traffic begins.
The cable dsg tg group-id command was introduced in this release.
The updated section in the 'Advanced Mode DOCSIS Set-Top Gateway 1.2 for the Cisco CMTS Routers'
feature guide is available at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_docsis_gw12.html
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 1
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New and Changed Information
Modified Software Features in Cisco IOS Release 12.2(33)SCB4
CM Steering Enhancement
In Cisco IOS Release 12.2(33)SCB, the CM would not come online if the CM attribute did not match
any channel attribute. In Cisco IOS Release 12.2(33)SCB4, if the legacy LB is configured on the channel
and if the CM attribute did not match any US channel in the same legacy LB group, the CM steering
feature enhancement allows the CMs to come online by skipping the CM steering check. However, the
US channel must meet the requirement of the CM US attribute masks if an LBG is not configured.
For more information, refer to the CM Steering on the Cisco CMTS Routers at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_cm_steer.html
New Software Features in Cisco IOS Release 12.2(33)SCB3
There are no new software features in Cisco IOS Release 12.2(33)SCB3.
Modified Software Features in Cisco IOS Release 12.2(33)SCB3
There are no modified features in Cisco IOS Release 12.2(33)SCB3.
New Software Features in Cisco IOS Release 12.2(33)SCB2
There are no new software features in Cisco IOS Release 12.2(33)SCB2.
Modified Software Features in Cisco IOS Release 12.2(33)SCB2
There are no modified features in Cisco IOS Release 12.2(33)SCB2.
New Software Features in Cisco IOS Release 12.2(33)SCB1
This section describes the new cable software features in Cisco IOS Release 12.2(33)SCB1. Some
features may be new to Cisco IOS Release 12.2(33)SCB1 but were released in earlier Cisco IOS software
releases. Some features may have been released in earlier Cisco IOS software releases and have been
changed in Cisco IOS Release 12.2(33)SCB1. To determine if a feature is new or changed, see the feature
history table at the beginning of the feature module for that feature. Links to feature modules are
included below. If a feature listed below does not have a link to a feature module, that feature is
documented only in the release notes, and information about whether the feature is new or changed will
be available in the feature description provided below.
Enhanced Show Tech
A new keyword, cmts, has been added to the show tech-support command to provide debugging
information specific to a cable interface or a modem.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 1
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New and Changed Information
For details about this command, see the Cisco IOS CMTS Cable Command Reference at the following
URL:
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_19_show_m_to_show_z.html#wp
1011194
Cable Modem QoS Information
A new command, show cable modem service-flow, is introduced to provide information about all
service flows associated with a particular modem.
For details about this command, see the Cisco IOS CMTS Cable Command Reference at the following
URL:
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_16_show_cable_m_to_show_cabl
e_u.html
SAMIS CLC-RP Traffic Throttling
The SAMIS CLC-RP traffic throttling feature limits or throttles the data collection between the cable
line card and the route processor. This functionality is achieved using the new cable metering
data-per-session command. This feature also reduces the congestion in the Broadband Processing
Engine (BPE) due to the SAMIS data collection from CLC to RP.
The following commands are new or modified:
•
cable metering data-per-session
•
show cable metering verbose
•
cable metering destination
For more information about these commands, see the Cisco IOS CMTS Cable Command Reference guide
at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_book.html
Modified Software Features in Cisco IOS Release 12.2(33)SCB1
There are no modified features in Cisco IOS Release 12.2(33)SCB1.
New Software Features in Cisco IOS Release 12.2(33)SCB
This section describes the new cable software features in Cisco IOS Release 12.2(33)SCB. Some
features may be new to Cisco IOS Release 12.2(33)SCB but were released in earlier Cisco IOS software
releases. Some features may have been released in earlier Cisco IOS software releases and have been
changed in Cisco IOS Release 12.2(33)SCB. To determine if a feature is new or changed, see the feature
history table at the beginning of the feature module for that feature. Links to feature modules are
included below. If a feature listed below does not have a link to a feature module, that feature is
documented only in the release notes, and information about whether the feature is new or changed will
be available in the feature description provided below.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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New and Changed Information
Bypass the 24 Hour Timer for WB CM Use of Failed RF Channels
When the CM sends a request to the CMTS for bonded service, the CMTS assigns the best available
bonding group that is compatible with the CM. The CM then attempts to acquire the non-primary DS RF
channels that are members of that bonding group. If the CM is unable to acquire one or more of the
channels, it returns an error code causing the CMTS to mark all of the assigned RF channels as
unacceptable for that CM. In prior versions, the channels so marked could not be reassigned to the same
CM for up to 24 hours.
The new feature has removed the 24 hour timer required to clear these channels. Once the CM
successfully completes registration, the list of failed RF channels for that CM is cleared. If the RF
impairment has been eliminated when the CM re-registers, that channel can be reused immediately.
There are no new or modified commands for this feature.
For more information, see the Wideband Modem Resiliency feature guide at the following URL:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_wm_resiliency.html
CM Steering
The Cable Modem (CM) Steering feature helps to redirect or steer CMs to multiple Cable Modem
Termination Systems (CMTS) using downstream frequency overrides. A configurable string is used to
bond the CM to the proper CMTS. Once the bonding is done, you can redirect or steer the CMs to one
or more CMTSs using downstream frequency overrides.
The following commands are new or modified:
•
cable service type
•
cable service type ds-frequency
•
cable upstream attribute-mask
•
clear cable modem attribute-masks
•
clear cable modem service-type
•
show cable modem service-type
For detailed information about this feature, see the CM Steering on the Cisco CMTS Routers document
at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_cm_steer.html
CMTS IPDR/SP
The Cisco universal broadband router supports the Internet Protocol Detail Record (IPDR) Streaming
Protocol feature that enables efficient and reliable delivery of high volume data records from the service
elements to any systems, such as mediation systems and BSS/OSS. IPDR Streaming Protocol is designed
to address critical issues such as the need for a reliable, fast, efficient and flexible export process of high
volume data records such as billing, performance, and diagnostic data.
The IPDR/SP process communicates with the IPDR collectors. The architecture supports primary and
secondary collectors for failover purposes. At any time, data is sent only to one collector. If the exporter
to primary collector connection failed due to any reason, the data is sent to a secondary collector.
Depending on the network configuration, you can have multiple primary collectors designed for different
types of data. For example, there may be a billing collector, a diagnostic collector, and so on.
The following commands are new in Cisco IOS Release 12.2(33)SCB.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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New and Changed Information
•
ipdr session
•
ipdr collector
•
ipdr associate
•
ipdr template
•
ipdr exporter start
•
ipdr session (global configuration)
•
show ipdr session
•
show ipdr session template
•
show ipdr session collector
•
show ipdr exporter
•
show ipdr collector
For more information on the IPDR, see the Configuring IPDR Streaming Protocol on the CMTS Router
document at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ipdr_feature.html
DOCSIS 3.0 Multicast Support
Cisco IOS Release 12.2(33)SCB introduces multicast improvements as mandated by DOCSIS 3.0
specifications on the Cisco CMTS routers. DOCSIS 3.0 multicast support improves bandwidth
efficiency and allows service providers to offer differentiated quality of service for different types of
traffic.
Using the multicast improvements, the cable operators can seamlessly deliver advanced services like
Video On Demand (VoD), IPTV, and facilitate interactive video and audio and data services.
The following commands are new or modified:
•
cable multicast authorization
•
cable multicast authorization profile
•
cable multicast group-qos
•
cable service class
•
match rule
•
show cable multicast authorization
•
show cable multicast db
•
show cable multicast dsid
•
show cable multicast qos
For detailed information about this feature, see the DOCSIS 3.0 Multicast Support on the CMTS Routers
document at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_d30_mcast_support.html
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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New and Changed Information
Dynamic Service Transaction ID Allocation
DOCSIS 2.0 mandates unique Transaction IDs (TAIDs) across transactions. The TAIDs must be unique
and not incremented. The TAIDs are assigned by the senders and sometimes the TAID timeout is
mismatched between senders and receivers. This affects the uniqueness of the TAID.
A TAID can be reused when the sender finishes a transaction. Similarly, DOCSIS allows the receiver to
identify a transaction by TAID without the SFID. Problems arise in DSD transaction and DSA/DSC
interrupted transactions, when these two requirements are combined.
The uniqueness of TAID must be ensured to resolve the interoperability issue. This is done by making
the CMTS wait until T10 to reuse the same TAID. A new TAID allocation algorithm is used to fulfill this
requirement.
It creates a TAID pool to replace the existing 16-bit counter. This TAID pool is monitored by timers to
track the TAID expiration. A flag is assigned to each TAID in the pool to indicate its availability. When
new TAID is requested, the dynamic service process checks the availability of the TAID. If the TAID is
available, it is allocated to the new service flow, or else the request is rejected.
Once the TAID is allocated, the timer starts with T10 expiration time and the TAID flag is set to FALSE
to indicate the unavailability of the TAID. The dynamic service process keeps track of the timer. When
the time expires, the timer stops and the flag is set to TRUE to indicate the availability of the TAID.
The TAID pool is allocated and initialized at the process initialization. All timers associated with the
TAIDs are added as leaf timers to the process parent timer.
For detailed information about this feature, see the Configuring Video over DOCSIS Broadcast on the
Cisco CMTS Routers document at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_pktcable_mm.html
IGMP-Triggered VDOC Broadcast Support
The Cisco universal broadband router supports the Video over DOCSIS (VDOC) feature enabling
multiple system operators (MSOs) to broadcast video content on RF-spanned downstream signals.
The VDOC feature facilitates broadcasting video over DOCSIS (Data Over Cable Service Interface
Specification). Video streams are broadcast to one or more downstream RF channels using static
multicast. Depending on the video stream selected for viewing by the IP set-top box, the multi-tuner
cable modem is tuned to the appropriate RF channel carrying the specific video stream.
For more information on the VDOC, see the Configuring Video over DOCSIS Broadcast on the Cisco
CMTS Routers document at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/VDOC_dbc_feature.html
IP SLAs—Random Scheduler
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_multi_scheduler.html
IP SLAs—Additional Threshold Traps
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/command/reference/sla_book.html
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New and Changed Information
IP SLAs—Proactive Threshold Monitoring of IP SLAs Operations
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_threshold_mon.html
IP SLAs—Analyzing IP Service Levels Using the UDP Jitter Operation
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_udp_jitter.html
IP SLAs—Analyzing VoIP Service Levels Using the UDP Jitter Operation
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_udp_jitter_voip.html
IP SLAs—Analyzing IP Service Levels Using the TCP Connect Operation
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_tcp.html
IP SLAs—Scheduler
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_overview.html
IP SLAs—Proactive Threshold Monitoring of IP SLAs Operations
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_threshold_mon.html
IP SLAs—One Way Measurement
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_overview.html
IP SLAs—Multioperation Scheduling of IP SLAs Operations
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_multi_scheduler.html
IP SLAs—MPLS VPN Awareness
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_overview.html
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Introduction
Chapter 1
Introduction
New and Changed Information
IP SLAs—Analyzing IP Service Levels Using the ICMP Path Echo Operation
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_icmp_pathecho.html
IP SLAs—Analyzing IP Service Levels Using the HTTP Operation
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_http.html
IP SLAs—Analyzing IP Service levels Using the FTP Operation
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_ftp.html
IP SLAs—Analyzing IP Service Levels Using the DNS Operation
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_dns.html
IP SLAs—Distribution of Statistics
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_dns.html
IP SLAs—Analyzing IP Service Levels Using the DHCP Operation
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_dhcp.html
IP SLAs—CLI Phase 3
For detailed information about this feature, see the following Cisco document:
http://www.cisco.com/en/US/docs/ios/ipsla/command/reference/sla_book.html
Load Balancing Prohibition Based on Group Policy ID
Effective with Cisco IOS Release 12.2(33)SCB, and later releases, load balancing is enhanced to use
rules and policies to decide on moving the CMs within their LB groups. These policies are created on
the CMTS and chosen on a per-CM basis using TLV portion (43.1, Policy ID) of REG-REQ. These
policies prohibit a modem from being moved or restricted.
A policy contains a set of rules. When it is defined by multiple rules, all rules apply in combinations. A
rule can be defined as "enabled", "disabled", or "disabled during time period."
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New and Changed Information
Each rule can be used by more than one policy. When it is defined by multiple rules, all rules apply in
combinations. Each rule helps to prohibit load balancing using a particular CM and to prohibit load
balancing using a particular CM during certain times of the day.
For detailed information about this feature, see the Load Balancing and Dynamic Channel Change on
the Cisco CMTS Routers document at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/ubr_load-bal_dcc.html
RSVP-Based Video on Demand Support over DOCSIS
The Cisco universal broadband router supports Video on Demand over DOCSIS (Data Over Cable
Service Interface Specification) services using RSVP (Resource ReSerVation Protocol) bandwidth
request from the VoD server. The RSVP protocol is used by the Cable Modem Termination System
(CMTS) to request video data from the network for specific application data flows.
The RSVP protocol is used by a host to request specific qualities of service (QoS) from the network for
particular application data streams or flows. RSVP is used by the CMTS to deliver video requests along
the data path of the flows and maintains the state to provide the requested service. RSVP requests will
generally result in resources being reserved in each node along the data path.
The following commands are new in Cisco IOS Release 12.2(33)SCB.
•
cable rsvp default-scn
•
show cable rsvp flow-db
For more information on the RSVP, please see
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/VDOC_rsvp_feature.html
Subscriber Management Packet Filtering for DOCSIS 2.0
The Cisco universal broadband router supports management of data packet filtering based on the
subscriber's preferences and criteria. Packet filtering enhances security to the cable network by allowing
only the specific packets to flow to the Customer Premise Equipment (CPE) while dropping the
unwanted data packets from the cable network. The Cisco uBR7225VXR router and Cisco
uBR7246VXR router support this feature.
A filter group specifies what filters are applied to the packets going to or coming from each specific CM
or CPE device. It defines the rules or criteria to filter or drop a packet. Every packet that has to be filtered
can either be accepted to send or filtered to be dropped. The criteria to filter a packet depends on the
subscriber's preferences. The filter group can be applied to different subscriber management groups.
The following commands are new or modified in Cisco IOS Release 12.2(33)SCB.
•
cable filter group
•
cable submgmt default filter-group
For more information on the subscriber management packet filtering, please see
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/SMPF_feature.html
Subscriber ID Support for Packetcable
Subscriber ID is added to all Gate Control messages and enhances error codes returned from the Cable
Modem Termination System (CMTS).
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New and Changed Information
Previously, the Gate ID was unique only to individual CMTS systems, with the CMTS proxying all CMS
(Call Management Server) Gate control messaging through a central device which manages the CMTS
connections on the behalf of the CMS. The CMS had a single Common Open Policy Service (COPS)
association to the proxy device. Therefore, the Gate IDs could be duplicated when using multiple CMTS
systems.
The new PacketCable Subscriber ID feature adds a Subscriber ID to each Gate Control message to
disambiguate the Gate IDs between the CMS and proxy device. The Subscriber ID parameter is added
to the following COPS messages:
•
GATE-INFO
•
GATE-DELETE
•
GATE-OPEN
•
GATE-CLOSE
The Subscriber ID is available at the CMS and is used in the Gate-Set messages. Additionally, the error
codes returned from CMTS or its proxy are enhanced to include more specific information about gate
operation failures.
To enable this feature, a new command is introduced: packetcable gate send-subscriber ID used in global
configuration mode. For more information, see the Packetcable feature in the Cisco IOS CMTS Cable
Command Reference Guide at
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_pktcable_mm.html
Subscriber Traffic Management Version 1.2
The STM feature enables service providers to identify and control subscribers who exceed the maximum
bandwidth allowed under their registered quality of service (QoS) profiles. STM works as a low CPU
alternative to Network-Based Application Recognition (NBAR) and access control lists (ACLs),
however, using STM does not mean that NBAR and ACLs have to be turned off; STM can be applied
along with NBAR and ACLs. STM also works in conjunction with the Cisco Broadband Troubleshooter
to support additional network management and troubleshooting functions in the Cisco CMTS.
The STM Version 1.2 feature is enhanced in Cisco IOS Release 12.3(23)BC2 and integrated into Cisco
IOS Release 12.2(33)SCB with the following support on the Cisco uBR7246VXR Universal Broadband
Routers:
•
Support for suspension of the cable modem (CM) penalty period at a certain time of day.
•
Support for weekday and weekend traffic monitoring.
•
Support of up to 40 total enforce rules.
•
Support for service providers to change subscriber service classes for a particular modem using the
cable modem service-class-name command.
Addition of the following SNMP objects to the CISCO-CABLE-QOS-MONITOR-MIB:
•
ccqmCmtsEnfRulePenaltyEndTime
•
ccqmCmtsEnfRuleWkndOff
•
ccqmCmtsEnfRuleWkndMonDuration
•
ccqmCmtsEnfRuleWkndAvgRate
•
ccqmCmtsEnfRuleWkndSampleRate
•
ccqmCmtsEnfRuleWkndFirstPeakTime
•
ccqmCmtsEnfRuleWkndFirstDuration
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New and Changed Information
•
ccqmCmtsEnfRuleWkndFirstAvgRate
•
ccqmCmtsEnfRuleWkndSecondPeakTime
•
ccqmCmtsEnfRuleWkndSecondDuration
•
ccqmCmtsEnfRuleWkndSecondAvgRate
•
ccqmCmtsEnfRuleWkndOffPeakDuration
•
ccqmCmtsEnfRuleWkndOffPeakAvgRate
•
ccqmCmtsEnfRuleWkndAutoEnforce
The following commands are new or modified:
•
cable modem service-class-name
•
penalty-period
•
show cable qos enforce-rule verbose
•
weekend duration
•
weekend off
•
weekend peak-time1
For detailed information about this feature, see the Subscriber Traffic Management on the Cisco CMTS
Routers document at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_sbsbr_tfmgt.html
Upstream Utilization Optimization
The Upstream (US) Utilization Optimization feature on the Cisco Cable Modem Termination System
(CMTS) routers provides higher upstream throughput. It provides the following benefits and functions
on a Cisco CMTS router:
•
Group configuration mode enables rate-adapt eligibility on all cable modem upstream flows.
•
Local configuration mode enables rate-adapt eligibility on a specific upstream, provides
configuration of selective parameters, and provides that local configuration overrides any global
configuration.
The following commands are new or modified:
•
cable upstream rate-adapt (global)
•
cable upstream rate-adapt (interface)
•
show cable rate-adapt
•
show interface cable sid
•
show interface cable upstream
For detailed information about this feature, see the Upstream Utilization Optimization on the Cisco
CMTS Routers document at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_upstream_rate_adapt.html
Modified Software Features in Cisco IOS Release 12.2(33)SCB
There are no modified software features in Cisco IOS Release 12.2(33)SCB.
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MIBs
MIBs
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use
Cisco MIB Locator found at the following URL:
http://tools.cisco.com/ITDIT/MIBS/servlet/index
If Cisco MIB Locator does not support the MIB information that you need, you can also obtain a list of
supported MIBs and download MIBs from the Cisco MIBs page at the following URL:
http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml
To access Cisco MIB Locator, you must have an account on Cisco.com. If you have forgotten or lost your
account information, send a blank e-mail to [email protected]. An automatic check verifies that
your e-mail address is registered with Cisco.com. If the check is successful, account details with a new
random password is e-mailed to you. Qualified users can establish an account on Cisco.com by following
the directions found at this URL:
http://tools.cisco.com/RPF/register/register.do
For information about the MIBs supported by the Cisco universal broadband routers, see the Cisco
CMTS Universal Broadband Series Router MIB Specifications Guide.
New and Changed MIB Information in Cisco IOS Release 12.2(33)SCB
The Cisco universal broadband routers include or add support for the following MIBs in
Cisco IOS Release 12.2(33)SCB:
•
CLAB-TOPO-MIB
•
DOCS-DIAG-MIB
•
DOCS-DRF-MIB
•
DOCS-IF3-MIB
•
DOCS-IETF-CABLE-DEVICE-NOTIFICATION-MIB
•
DOCS-IETF-BPI2-MIB
•
DOCS-IETF-QOS-MIB
•
DOCS-IFEXT2-MIB
•
DOCS-QOS3-MIB
•
DOCS-TEST-MIB
Limitations and Restrictions
This section describes restrictions for the Cisco universal broadband routers in
Cisco IOS Release 12.2(33)SCB.
Unsupported Hardware
For a list of unsupported hardware, see the End-of-Life and End-of-Sale Notices at the following URLs:
•
http://www.cisco.com/en/US/products/hw/cable/ps2217/prod_eol_notices_list.html
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Limitations and Restrictions
Software Feature Restrictions
This section describes other important guidelines or restrictions to consider when running Cisco IOS
Release 12.2SC that might not yet be documented in the supporting customer documentation.
DOCSIS
•
You cannot configure an upstream connector to more than one fiber node.
•
Multicast over DOCSIS L2VPN does not work for a DOCSIS 3.0-bonded cable modem (CM) when
DOCSIS L2VPN is provisioned on a DOCSIS 3.0-bonded CM and downstream multicast traffic is
sent over L2VPN. You can use a DOCSIS L2VPN classifier to classify multicast traffic on a
secondary DS service flow with SF attributes (TLV 25.31/32) specifying primary DS for the CM.
As a result, L2VPN multicast traffic will use the primary DS and L2VPN unicast traffic will be
forwarded over the primary bonding group. The service flow attribute feature is available in Cisco
IOS Release 12.2SCB.
•
IP-MIB is implemented as read-only. Writing is not supported for ipv6IPForwarding or
ipv6IpDefaultHopLimit.
•
docsIf3MdCfgMcastDsidFwdEnabled object is implemented as read-only.
•
cdxBWQueueMaxDepth object sometimes reports a value out of range. The supported range is from
0 to 64, but the object sometimes returns a value of 128 when queried.
MIBs Restriction
PacketCable
Payload Header Suppression (PHS) is not supported on wideband Embedded Media Terminal Adapters
(eMTAs) for dynamic downstream service flows.
PXF
Statistics for two different divert-rate limit (DRL) WAN-IP streams can momentarily overlap or collide
and produce statistics that are lower than expected.
Redundancy
•
Although the software does not prevent it, pre-configuring commands on a protect line card is not
supported.
•
A dynamic service-flow for a PacketCable call is not deleted during a line card switchover.
•
Although the Cisco CMTS router is initially configured only for global N+1 redundancy, the show
running-configuration command displays both global and legacy interface-level Hot-Standby
Connection-to-Connection Protocol (HCCP) configuration when you change redundancy mode
configuration from SSO to RPR mode. If you switch back to SSO mode, both redundancy
configurations are still shown.
•
In very rare circumstances after an N+1 switchover, upstream traffic that is using Baseline Privacy
Interface (BPI) encryption is not received properly by the CMTS router. Input errors are logged on
the interface and the debug cable error command shows error messages similar to the following:
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Important Notes
Cable5/1/4: Bad rx packet. JIB status code 0xA
The issue occurs on upstream channels that use a “shared” connector, where the other upstream
channel using the same shared connector is on another downstream and is shutdown. To workaround
this issue, you can activate the downstream and other upstream channel using the same shared
connector or temporarily unshare the upstream connector.
Wideband
•
If you configure a wideband interface with more than one MAC domain host sharing the committed
information rate (CIR) bandwidth, then the total wideband interface CIR bandwidth gets fragmented
among the MAC Domain hosts sharing the WB interface CIR bandwidth.
The WB interface CIR bandwidth can be shared by multiple MAC domain hosts, and these MAC
domain hosts could potentially be on the same or different cable line cards. As admission control
for WB interfaces happens on cable line cards, the available CIR bandwidth gets partitioned and
given to the MD hosts causing the bandwidth fragmentation. However if a typical service flow CIR
is very small compared to the total CIR of the wideband interface, then this fragmentation is not
visible until the CIR usage reaches very high levels close to the total interface bandwidth.
With certain bandwidth percent configuration and traffic distribution, the overall link utilization of
dynamic bandwidth sharing (DBS) can be as low as 85%. For example, this can occur if the traffic
rate on a wideband interface is smaller than its configured bandwidth percent, but the traffic rate on
a modular-cable interface is much larger than its bandwidth percent. The packet drops happen only
on the modular-cable interface which has a larger amount of traffic than its bandwidth-percent. To
workaround this scenario, configure a higher bandwidth percentage to the modular-cable interface,
which is larger than or equal to its expected/average traffic rate.
Important Notes
Note
This section is subject to change and is not intended to cover all changes found in the software. There
may be other changes within the software that are not identified here, such as within the new and
modified features. Closely read these release notes in their entirety, as well as review the related caveats
documents for more information.
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Obtaining Documentation and Submitting a Service Request
Table 7 identifies some of the key changes that you should consider when running Cisco IOS Release
12.2(33)SCB.
Table 7
Important Changes in Cisco IOS Release 12.2SC
Change Description
Clearing Address Resolution Protocol (ARP) Entries
Using the clear arp command can take about 15 seconds to remove all ARP table
entries.
Point-to-Point over Ethernet Configuration
For Point-to-Point over Ethernet (PPoE) configuration on the Cisco uBR7200
series routers, the bba-group command replaces the vpdn-group command. The
software automatically converts an existing vpdn-group configuration to
bba-group global configuration. After the configuration of bba-group, you
cannot configure PPoE at the virtual private dialup network (VPDN) level. You
need to use the bba-group configuration.
DOCSIS
CM-STATUS messages are enabled by default.
Release Introduced
12.2(33)SCA
12.2(33)SCA
12.2(33)SCB
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, submitting a service request, and gathering additional
information, see the monthly What’s New in Cisco Product Documentation, which also lists all new and
revised Cisco technical documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
Subscribe to the What’s New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed
and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free
service and Cisco currently supports RSS version 2.0.
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CH A P T E R
2
Caveat List for Cisco IOS Release 12.2(33)SCB
This chapter describes open and resolved severity 1 and 2 caveats and select severity 3 caveats:
•
The “Open Caveats” sections list open caveats that apply to the current release and may apply to
previous releases. A caveat that is open for a prior release and is still unresolved applies to all future
releases until it is resolved.
•
The “Resolved Caveats” sections list caveats resolved in a specific release, but open in previous
releases.
The bug IDs are sorted alphanumerically.
Note
The Caveats section includes the bug ID and a short description of the bug. For details on the symptoms,
conditions, and workaround for a specific caveat you must use the Bug Search Tool.
Cisco Bug Search
Cisco Bug Search Tool (BST), the online successor to Bug Toolkit, is designed to improve
effectiveness in network risk management and device troubleshooting. You can search for bugs
based on product, release, and keyword, and aggregates key data such as bug details, product, and
version. For more details on the tool, see the help page located at
http://www.cisco.com/web/applicat/cbsshelp/help.html
Open Caveats—Cisco IOS Release 12.2(33)SCB11
Bug ID
Description
CSCsw37209
The cable ipv6 src-verify command is not effective when configured on Cisco
uBR7200 platform.
CSCsy56666
The cable primary-sflow-qos11 keep snmp-only command is not working
properly and the primary service flow packet/byte count is not retained after the
cable modem reset.
CSCsz36328
Cable modems remain in online (pk) and expired states after cable privacy
mandatory command is executed.
CSCsz63011
Cable metering traps are not getting generated for streaming mode.
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Caveat List for Cisco IOS Release 12.2(33)SCB
Bug ID
Description
CSCsz67716
The 'Gate Report State' counter of the show packetcable cms verbose command
output is not getting incremented for PacketCable MultiMedia (PCMM) policy
servers.
CSCtb79237
No syslog or SNMP trap is generated when Common Open Policy Service (COPS)
process is used causing PacketCable to fail.
CSCtc65910
A header buffer memory leak may be observed on Cisco CMTS.
CSCte91760
Simulating an intermediate session routing (ISR) watchdog using a busy-loop
delay in an ISR, results in an incorrect traceback. Further, an infinite loop in the
ISR results in no ISR watchdog functionality at all.
CSCth24131
The show context summary command always reports null crashes when there are
crashes on the cable line card.
CSCti19280
The FFT engine is not updated with the CNR threshold values if a change is made
either in the CLI or the SNMP interface to the CNR threshold profile for a given
upstream.
Resolved Caveats—Cisco IOS Release 12.2(33)SCB11
Bug ID
Description
CSCtd25669
When a secondary rf-channel shutdown/no shutdown is performed on a Cisco
uBR-MC8X8 cable interface line card, the wideband CM reports primary-channel
QAM failure/recovery.
CSCti71911
When a Cisco IOS release 12.2(33)SCB10 downgrade is performed on the active
RP, the standby RP resets the peak-rate TLV.
CSCti81896
When the ingress cancellation feature is enabled, all modems on an upstream may
momentarily go offline and then recover within minutes.
Open Caveats—Cisco IOS Release 12.2(33)SCB10
Bug ID
Description
CSCsw37209
The cable ipv6 src-verify command is not effective when configured on Cisco
uBR7200 platform.
CSCsy56666
The cable primary-sflow-qos11 keep snmp-only command is not working
properly and the primary service flow packet/byte count is not retained after the
cable modem reset.
CSCsz36328
Cable modems remain in online (pk) and expired states after cable privacy
mandatory command is executed.
CSCsz63011
Cable metering traps are not getting generated for streaming mode.
CSCsz67716
The 'Gate Report State' counter of the show packetcable cms verbose command
output is not getting incremented for PacketCable MultiMedia (PCMM) policy
servers.
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Caveat List for Cisco IOS Release 12.2(33)SCB
Bug ID
Description
CSCtb79237
No syslog or SNMP trap is generated when Common Open Policy Service (COPS)
process is used causing PacketCable to fail.
CSCtc65910
A header buffer memory leak may be observed on Cisco CMTS.
CSCte91760
Simulating an intermediate session routing (ISR) watchdog using a busy-loop
delay in an ISR, results in an incorrect traceback. Further, an infinite loop in the
ISR results in no ISR watchdog functionality at all.
CSCth24131
The show context summary command always reports null crashes when there are
crashes on the cable line card.
CSCti19280
The FFT engine is not updated with the CNR threshold values if a change is made
either in the CLI or the SNMP interface to the CNR threshold profile for a given
upstream.
Resolved Caveats—Cisco IOS Release 12.2(33)SCB10
Bug ID
Description
CSCsg82766
CMTS may crash due to a bus error during user authentication.
CSCsr40529
Corrupted output is displayed when the standby disk is formatted during an In-Service Software Upgrade (ISSU) of the CMTS router running Cisco IOS Release
12.2(33)SCB4.
CSCsr96042
Router crashes when the VPN Routing and Forwarding (VRF) configuration is
changed.
CSCsv06975
Dynamic Message Integrity Check (DMIC) fails TFTP for IPv6 over CMTS bundle
subinterface
CSCsv73754
A router crash is observed during VPN Routing and Forwarding (VRF) configuration.
CSCsw73403
CMTS does not warn the user while configuring a bundle subinterface if the
primary bundle has any IPv6 enabled.
CSCsx58335
When relaying to multiple servers from an unnumbered interface, the DHCP relay
sends packets to all servers, even for packets where the client is in a RENEWING
state unicasting to attempt to reach a single server.
CSCtc73759
The H.323 implementation in Cisco IOS Software contains two vulnerabilities that
may be exploited remotely to cause a denial of service (DoS) condition on a device
that is running a vulnerable version of Cisco IOS Software.
CSCtc95495
The show cable modem service-flow verbose command incorrectly displays the
MAC Rewrite Indices (MRI) that exceed 64 K. Subsequent information displayed
by this command is also incorrect because it is dependent on the MRI.
CSCtd20903
The cable clock dti command does not work occasionally when one of the two
DTCC cards in the CMTS system is unplugged during run time.
CSCtd83463
DOCSIS 3.0 cable modem goes offline after executing test cable dcc command.
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Caveat List for Cisco IOS Release 12.2(33)SCB
Bug ID
Description
CSCtd86472
The Cisco IOS Software Network Address Translation functionality contains three
denial of service (DoS) vulnerabilities. The first vulnerability is in the translation
of Session Initiation Protocol (SIP) packets, the second vulnerability in the translation of H.323 packets and the third vulnerability is in the translation of H.225.0
call signaling for H.323 packets.
CSCte17479
All cable modems under a single upstream unexpectedly move to expire (pt) state
on the Cisco CMTS router.
CSCte83897
The output of the MIB object docsDiag is not complete when the number of CMs
in error state is greater than 30.
CSCte94013
When the diagnostic log feature is active and cable modems are flapping, some of
the cable modem records are not obtained by an SNMP query command such as
snmpwalk docsDiagMib.
CSCte97922
The hardware version, software version and serial number are not displayed for
UBR10-FAN-ASSY, UBR10-PWR-DC and UBR10-PWR-AC modules.
CSCte99323
The secondary RP is reset due to parser return error after the secondary collector
associate on the IPDR config is added or deleted.
CSCtf05943
Cable modem subscribers experience one-way RTP traffic.
CSCtf78545
IPv6 does not work on multiple CMTS bundle subinterface.
CSCtg07854
Packets are assigned to wrong queues when the policy-map configuration is
modified.
CSCtg21410
The RP crashes when polling SNMP MIB object ciscoFlashMIB.
CSCtg40581
Missing entries when polling the SNMP MIB object ifStackStatus.
CSCtg92199
The Support for IfMIB is added for CMTS bundle IPv6 subinterface.
Open Caveats—Cisco IOS Release 12.2(33)SCB9
Bug ID
Description
CSCsy56666
The cable primary-sflow-qos11 keep snmp-only command is not working
properly and the primary service flow packet/byte count is not retained after the
cable modem reset.
CSCsz63011
Cable metering traps are not getting generated for streaming mode.
CSCsz67716
The 'Gate Report State' counter of the show packetcable cms verbose command
output is not getting incremented for PacketCable MultiMedia (PCMM) policy
servers.
CSCtd83463
DOCSIS 3.0 cable modem goes offline after executing test cable dcc command.
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Resolved Caveats—Cisco IOS Release 12.2(33)SCB9
Bug ID
Description
CSCtd86472
The Cisco IOS Software Network Address Translation functionality contains three
denial of service (DoS) vulnerabilities. The first vulnerability is in the translation
of Session Initiation Protocol (SIP) packets, the second vulnerability in the translation of H.323 packets and the third vulnerability is in the translation of H.225.0
call signaling for H.323 packets.
Open Caveats—Cisco IOS Release 12.2(33)SCB8
Bug ID
Description
CSCsy56666
The cable primary-sflow-qos11 keep snmp-only command is not working
properly and the primary service flow packet/byte count is not retained after the
cable modem reset.
CSCsz63011
Cable metering traps are not getting generated for streaming mode.
CSCsz67716
The 'Gate Report State' counter of the show packetcable cms verbose command
output is not getting incremented for PacketCable MultiMedia (PCMM) policy
servers.
CSCtd83463
DOCSIS 3.0 cable modem goes offline after executing test cable dcc command.
Resolved Caveats — Cisco IOS Release 12.2(33)SCB8
Bug ID
Description
CSCtc73759
The H.323 implementation in Cisco IOS Software contains two vulnerabilities that
may be exploited remotely to cause a denial of service (DoS) condition on a device
that is running a vulnerable version of Cisco IOS Software.
CSCte14603
A vulnerability in the Internet Group Management Protocol (IGMP) version 3 implementation of Cisco IOS Software and Cisco IOS XE Software allows a remote
unauthenticated attacker to cause a reload of an affected device. Repeated attempts
to exploit this vulnerability could result in a sustained denial of service (DoS) condition. Cisco has released free software updates that address this vulnerability.
Open Caveats—Cisco IOS Release 12.2(33)SCB7
•
CSCsy56666
Symptoms: The cable primary-sflow-qos11 keep snmp-only command is not working as expected
and the primary service flow packet/byte count is not retained after the cable modem is reset.
Conditions: This issue is seen in DOCSIS 1.1 specific modems after reset.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Workaround: Clear the cable modem counters associated with primary service flows.
•
CSCsz63011
Symptoms: The cable metering traps are not generated as expected for streaming mode.
Conditions: There are no specific conditions for this issue to occur.
Workaround: There is no workaround.
•
CSCsz67716
Symptoms: The “Gate Report State” counter in the output of the show packetcable cms verbose
command does not increment for PacketCable Multimedia (PCMM) policy servers.
Conditions: This issue is seen for PCMM policy servers.
Workaround: There is no workaround.
•
CSCtd83463
Symptoms: The DOCIS 3.0 cable modem goes offline after a test cable dynamic channel change
(DCC) with ranging technique 1.
Conditions: There are no specific conditions for this issue to occur.
Workaround: There is no workaround.
•
CSCtf25400
Symptoms: The Cisco CMTS crashes as freelist corruption.
Conditions: Conditions are unknown.
Workaround: There is no workaround.
Resolved Caveats—Cisco IOS Release 12.2(33)SCB7
•
CSCsm88000
Symptoms: export-map route-map changes are not automatically updated in the Border Gateway
Protocol (BGP) VPNv4 table.
Conditions: This issue is seen on the universal broadband router running the
Cisco IOS Release 12.2(33)SRB under the following conditions:
When adding or removing the new route-target values under the route-map configuration, which is
being called by the export-map statement under VPN Routing and Forwarding (VRF) configuration.
Workaround: Perform a manual clear of the VRF routing table for the prefixes to be updated.
•
CSCsx33622
Symptoms: Flapping BGP sessions occur in the network when a Cisco IOS application sends
full-length segments with TCP options.
Conditions: This issue is seen when a Cisco IOS device that is configured to send TCP options sends
its initial Maximum Segment Size (MSS) during the three-way handshake. In this case, the router
incorrectly accounts for 20 bytes of TCP options when it sends this initial MSS.
This issue occurs when a "fixed" IOS communicates with a "non-fixed" IOS.
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Note
The "non-fixed" behavior is to subtract the 20 TCP option bytes when MSS values are
initially exchanged.
The "fixed" behavior is to not subtract the 20 TCP option bytes when MSS values are
initially exchanged.
Workaround: Set the MSS value on the "non-fixed" router to be the MSS received from the "fixed"
router minus the TCP options (20 bytes). Use the global command ip tcp mss to adjust the MSS
value that the router will use.
•
CSCsy31588
Symptoms: The show interface x/x/x service flow yy phs command does not record payload header
suppression (PHS) packets for upstream.
Conditions: This issue is seen when the PHS is enabled.
Workaround: Use the show cable modem classifier command to get the related classifier counter.
•
CSCsz13444
Symptoms: The show environment all displays information about numerous fans, even though
there is only one fan tray in the Cisco uBR7246VXR router.
Conditions: This issue is seen on the Cisco uBR7246VXR universal broadband router with the
NPE-G2 processor.
Workaround: The status of the fan tray is displayed by Fan 2.
•
CSCsz31339
Symptoms: The downstream packet source MAC address is corrupted when a cable intercept is
configured on the cable interface.
Conditions: There are no specific conditions for this issue to occur.
Workaround: There is no workaround.
•
CSCsz78872
Symptoms: A Cisco uBR7246VXR router with NPE G2 processor has wrongly assigned a common
MAC address to two ports instead of unique MAC addresses.
Workaround: There is no workaround.
•
CSCta45315
Symptoms: ccwbFiberNodeDescrTable MIB table does not read fiber node 256.
Conditions: There are no specific conditions for this issue to occur.
Workaround: Use the show running-config | begin fiber command to view description of fiber node
256.
•
CSCtb82697
Symptoms: The show controller cable command does not provide information about CPU revision.
Conditions: There are no specific conditions for this issue to occur.
Workaround: The show tech command provides information about the CPU revision.
•
CSCtc43231
Symptoms: SNMP traps and informs source interface do not work.
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Conditions: This issue occurs when the snmp-server trap-source Loopback0 and snmp-server
source-interface informs Loopback0 commands are configured.
Workaround: There is no workaround.
•
CSCtc60776
Symptoms: Layer 3 traffic cannot be forwarded by a Wideband CM in a non-MTC mode for a certain
period of time after the Cisco CMTS has used the downstream channel change (DCC) to change its
upstream with the initialization technique 1-4. The Wideband CM stays w-online.
Conditions: This issue occurs on wideband CMs. However, CMs running in non-MRC mode are not
affected.
Workaround: Use the upstream channel change (UCC) if the wideband supports it.
•
CSCtc60950
Symptoms: The Cisco uBR7225VXR router hangs due to SYS-3-CPUHOG, which is caused by the
EnvMon process.
Conditions: This issue is observed on the Cisco uBR7225VXR universal broadband router.
Workaround: There is no workaround.
•
CSCtc92379
Symptoms: Modems and service-flow counters update incorrectly.
Conditions: This issue occurs when the CM instance is marked offline due to errors during the DCC
rebuild.
Workaround: There is no workaround.
•
CSCtc93642
Symptoms: Spurious memory accesses and tracebacks are observed after a ping time out.
Conditions: The issue is seen on the Cisco IOS Release 12.2(33)SCB5 release.
Workaround: There is no workaround.
•
CSCtc96090
Symptoms: The polling of the MIB object IfHCInOctets or IfHCOutOctets wraps at the 32-bit
marker rather than at the expected 64-bit marker.
Conditions: This issue is observed in Cisco IOS Release 12.2(33)SCB4.
Workaround: There is no workaround.
•
CSCtd18368
Symptoms: When RF-channel 1 on one controller is shut down, RF-channel 1 on another controller
also automatically shuts down.
Conditions: This issue occurs when the wide band resiliency and cross-controller bonding group are
configured.
Workaround: There is no workaround.
•
CSCtd33099
Symptoms: The logical status of RF-channels in show cable rf-status command may still be in the
DOWN state, after executing the shut/no shut commands on those RF-channels.
Conditions: This issue occurs when the shut/no shut commands are executed on RF-channels of a
bonding group in the IC controller.
Workaround: There is no workaround.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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•
CSCtd35119
Symptoms: There is two entries for each chassis slot container in the output of SNMP.
Conditions: This issue occurs on the Cisco uBR7200 series universal broadband routers running the
Cisco IOS releases and have the “Get entity” MIB Objects in the SNMP client.
Workaround: There is no workaround.
•
CSCtd53334
Symptoms: Memory leak is observed on executing the show cable filter verbose command.
Conditions: This issue occurs on the Cisco uBR7200VXR universal broadband router.
Workaround: Do not execute the show cable filter verbose command on Cisco uBR7200VXR
universal broadband router.
•
CSCtd56821
Symptoms: The Cisco uBR7225VXR universal broadband router may crash after running the show
packetcable gate summary command.
Conditions: This issue was observed with a PacketCable gate created on slot 1/0 on a
Cisco uBR7225VXRuniversal broadband router.
Workaround: There is no workaround.
•
CSCtd60182
Symptoms: Although the secondary wideband interface is down, it can still be selected as a multicast
forwarding interface.
Conditions: This issue is seen on the Cisco uBR7200 universal broadband routers running the
Cisco IOS Release 12.2(33)SC.
Workaround: When configuring a secondary wideband interface as multicast forwarding interface,
ensure that the secondary wideband interface is not down.
•
CSCtd78225
Symptoms: High CPU usage seen after adding privilege interface commands.
Conditions: This issue was observed on Cisco CMTS routers running the
Cisco IOS Release 12.2(33)SCB5. After adding privilege interface commands, the CPU usage
peaks. When the configuration is saved, the CPU takes a while to reload.
Workaround: Do not use privilege commands.
•
CSCtd87704
Symptoms: Some Subscriber Account Management Interface Specification (SAMIS)/ IP Detail
Record (IPDR) processes are incorrectly killed. This may cause memory leaks on the Route
Processor (RP)/Network Processing Engine (NPE).
Conditions: This issue is seen when there is high CPU usage on the RP/NPE and when SAMIS/IPDR
is running.
Workaround: There's no workaround.
•
CSCtd93151
Symptoms: The network is shut down by the IOS and the voltage from voltage monitor chip is about
10 percent less than normal value.
Conditions: There are no specific conditions for this issue to occur.
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Workaround: Disable the environment monitor feature by executing the test cable envm off
command.
•
CSCte20216
Symptoms: Some cable modems, such as the DPC2505 cable modem report QAM/FEC lock failure
(event type 2) when a secondary RF-channel is down, and report an MDD recovery (event type 4)
when the RF-channel is UP, instead of reporting a QAM/FEC recovery.
This causes QAM/MDD state transition error in the Cisco CMTS.
Conditions: This issue is seen when a DPC2505 is connected to the Cisco CMTS.
Workaround: There is no workaround.
•
CSCte58329
Symptoms: Layer 2 VPN configuration with BPI configuration failed on the Cisco CMTS router.
Conditions: This issue is seen when both Layer 2 VPN and BPI are configured.
Workaround: There is no workaround.
Open Caveats—Cisco IOS Release 12.2(33)SCB6
•
CSCeh33888
Symptoms: A Cisco uBR7246VXR router may reload with configurations set during the last
watchdog reset.
Conditions: This issue occurs on a Cisco uBR7246VXR router having a Cisco uBR7200-NPE-G1
processor board and is running Cisco IOS Release 12.3(9a)BC.
Workaround: There is no workaround.
•
CSCsi63649
Symptoms: All routers synchronized to one router show the following error every 10 seconds:
Apr 23 13:33:41.929: %SYS-3-TIMERNEG: Cannot start timer (0x7543D68) with negative
offset (-996736100). -Process= "TTY Background", ipl= 0, pid= 42
Conditions: This issue is observed on some Cisco Gigabit Switch Routers (GSR) running
Cisco IOS Release 12.0(28)S, Cisco IOS Release 12.0(31)S, Cisco IOS Release 12.0(32)S, and
Cisco IOS Release 12.0(32)SY. This issue occurs when a telnet session is initiated on the router, and
a new telnet session is initiated simultaneously to a different device from the same telnet session.
The error message is displayed every 10 seconds when the exec-timeout command does not
disconnect the session and the timeout expires.
Workaround: Use the show users command to determine which users are connected via telnet. Then
use the clear line x command to clear the line and disconnect the session to stop the error messages.
•
CSCsl50133
Symptoms: The Cisco uBR7246VXR router reloads with following message:
No crashinfo
No tracebacks
Last reload reason: Unknown reason
Last reset from watchdog reset
Conditions: This issue was first observed on a Cisco uBR7246VXR (UBR7200-NPE-G1) router
running Cisco IOS Release 12.3(17b)BC4.
Workaround: There is no workaround.
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•
CSCsy24676
Symptoms: A false positive is returned when the file system fails. This results in the file operation
displayed as successful even though it failed.
Conditions: This issue occurs when the file system device returns an error and the code follows the
path in the file system buffer cache where the error is masked and converts it to a success code. This
issue occurs when there is a device error during the write. The device error may be due to bad media
or an OIR.
Workaround: There is no workaround.
•
CSCta03480
Symptoms: The configurations on the NPE-G1 processor and a line card do not synchronize.
Conditions: This issue occurs when there is an excess load between the line card and the
Cisco uBR7200-NPE-G1 processor board. The modem remains in reject(m) state.
Workaround: Execute the cable dynamic-secret exclude oui command.
•
CSCta28029
Symptoms: Flows with excess information rate (EIR) and maximum information rate (MIR) have
higher throughput than expected.
Conditions: This issue occurs when EIR is higher than MIR and there is congestion on the upstream.
Workaround: Ensure that MIR is greater than EIR.
•
CSCta45075
Symptoms: The show interface multicast-session command may show wrong multicast session
instances.
Conditions: This issue occurs after the following steps:
1.
An aggregate type GQC is created.
2.
The igmp join is sent to two sessions.
3.
The igmp leave is sent for session 1 and after seven seconds, to session 2.
4.
Session 2 is rejoined immediately after session 1 is deleted.
Workaround: There is no workaround.
•
CSCta77009
Symptoms: A Cisco uBR7200 series router may report memory leaks.
Conditions: This issue occurs when the dual-stack CPE devices are each running the FTP GET and
FTP PUT requests.
Workaround: There is no workaround.
•
CSCtb74904
Symptoms: The service flow counter displays the value 0.
Conditions: This issue occurs during an RP switchover. However, the right service flow is used to
forward the packets; the packets reach the CPEs as well.
Workaround: There is no workaround.
•
CSCtb79237
Symptoms: No system log or SNMP trap is generated.
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Conditions: This issue occurs in a PacketCable environment when the Common Open Policy Server
(COPS) process that is used for packetcable fails.
Workaround: There is no workaround.
•
CSCtb94400
Symptoms: During reboot, the multicast service flow for the tunnel is not established.
Conditions: This issue occurs during reboot if the cable multicast group-qos default scn
service-class-name aggregate is not configured.
Workaround: Configure the cable multicast group-qos command with default scn
service-class-name aggregate.
•
CSCtc09858
Symptoms: If the tunnel is disabled, the traffic does not stop. However, if the tunnel is disabled when
a "service class name" is not defined for the tunnel, the traffic stops, but re-enabling the tunnel does
not restart traffic.
Conditions: This issue is observed when the "service class name" is defined for the tunnel.
Workaround: Stop and start the traffic; remove and add the tunnel group to the interface.
•
CSCtc10231
Symptoms: Upstream power adjustment indication is seen after a cable modem comes online.
Conditions: This issue occurs once every hour when the show cable modem flap command is used.
Workaround: There is no workaround.
•
CSCtc11757
Symptoms: The write operation fails when a disk card is removed while being updated, has some
bad sectors, or does not respond when the card is being updated.
Conditions: This issue is observed under the following two conditions:
1.
The disk card is removed while copying to disk or formatting the disk.
If you then execute the show file system, dir disk, or show disk commands, the system hangs.
2.
During copy to disk operation, it is found that the card has bad sectors or is not responding.
If you then execute the show file system, dir disk, or show disk commands, the system hangs.
Workaround: For condition 1, avoid removing the card when the card is being updated.
For condition 2, replace the bad card with a good card.
•
CSCtc16252
Symptoms: The show inventory command does not display the output until 15 minutes after bootup
when there is no line card in the system.
Conditions: This issue is observed on the Cisco uBR7200 series universal broadband router running
Cisco IOS Release 12.2SC.
Workaround: There is no workaround.
•
CSCtc22435
Symptoms: The MIB object docsQosServiceFlowLogTable returns a null value.
Conditions: This issue occurs on the Cisco uBR7200 universal broadband router with “Keep QoS11
CM primary service flows counters” feature, while executing the cable primary-sflow-qos11 keep
all command.
Workaround: Unconfigure the feature by executing the cable primary-sflow-qos11 keep all
command.
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•
CSCtc29046
Symptoms: The write operation fails when a disk card is removed while being updated, has some
bad sectors, or does not respond when the card is being updated.
Conditions: This issue is observed under the following two conditions:
1.
The disk card is removed while copying to disk or formatting the disk.
If you then execute the show file system, dir disk, or show disk commands, the system hangs.
2.
During copy to disk operation, it is found that the card has bad sectors or is not responding.
If you then execute the show file system, dir disk, or show disk commands, the system hangs.
Workaround: For condition 1, avoid removing the card when the card is being updated.
For condition 2, replace the bad card with a good card.
•
CSCtc55893
Symptoms: The init-tech-ovr command in the load balancing group (LBG) does not function for
the second logical channel.
Conditions: This issue occurs when the second logical channel is selected as the source channel.
Workaround: There is no workaround.
•
CSCtc60776
Symptoms: Layer 3 traffic cannot be forwarded by a Wideband CM in a non-MTC mode for a certain
period of time after the Cisco CMTS has used the downstream channel change (DCC) to change its
upstream with the initialization technique 1-4. The Wideband CM stays w-online.
Conditions: This issue occurs on wideband CMs. However, CMs running in non-MRC mode are not
affected.
Workaround: Use the upstream channel change (UCC) if the wideband supports it.
•
CSCtc60950
Symptoms: The Cisco uBR7225VXR router hangs due to SYS-3-CPUHOG, which is caused by the
EnvMon process.
Conditions: This issue is observed on the Cisco uBR7225VXR router.
Workaround: Disable the EnvMon process using the test c7200 envm off command.
•
CSCtc61466
Symptoms: The cable intercept command on the cable interface is found missing after executing
the following commands.
hw-module slot <x> stop, hw-module slot <x> start for MC28U card
Conditions: This issue is observed on the Cisco uBR7200 router with the Cisco uBR-MC28U line
card running Cisco IOS Release 12.2S or Cisco IOS Release 12.3.
Workaround: There is no workaround.
•
CSCtc62324
Symptoms: A Cisco uBR7200 Series NPE crashes when dual-stack CPEs get the Layer 3 address
using DHCP/DHCPv6.
Conditions: This issue is observed with more than 300 dual-stack CPEs attempting to get both the
IPv4 and IPv6 addresses through DHCP.
Workaround: There is no workaround.
•
CSCtc69216
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Symptoms: There is an occurrence of a suspicious Any Transport over MPLS (AToM) L2VPN
MPLS Peer Name TLV Parsing Logic, which causes the VCID error.
Conditions: This issue occurs when the AToM L2VPN on the CM configuration file is configured
and the MPLS Peer Name TLV(37) is followed by VCID TLV(38).
Workaround: There is no workaround.
•
CSCtc74969
Symptoms: Cannot set the MIB object docsIf3MdCfgMultTxChModeEnabled to true.
Conditions: This issue occurs on the Cisco uBR7200 universal broadband router.
Workaround: Set “cable mtc-mode” using the CLI.
•
CSCtc79306
Symptoms: After configuring the MAC address in the bundle interface, the MAC state of the
Cisco DPC3000 cable modem is found to be w-online and not UB w-online.
Conditions: This issue occurs when the MAC address of the bundle interface is sent to the line card
(LC) when configured under the LC cable interface. This causes the security association (SA) of the
MAC Domain Descriptor (MDD) message and SYNC message to be different, which causes the
Cisco DPC3000 cable modem to be w-online instead of UB w-online.
Workaround: There is no workaround.
•
CSCtc92379
Symptoms: Modems and service-flow counters update incorrectly.
Conditions: This issue occurs when the CM instance is marked offline due to errors during the DCC
rebuild.
Workaround: There is no workaround.
•
CSCtc96090
Symptoms: The polling of the MIB object IfHCInOctets or IfHCOutOctets wraps at the 32-bit
marker rather than at the expected 64-bit marker.
Conditions: This issue is observed in Cisco IOS Release 12.2(33)SCB4.
Workaround: There is no workaround.
•
CSCtd04983
Symptoms: The Cisco uBR7200 VXR series router crashes at cmts_bundle_find_mcast_mac.
Conditions: This issue is observed after the CPE clients rapidly join and leave the multicast groups.
Workaround: There is no workaround.
Resolved Caveats—Cisco IOS Release 12.2(33)SCB6
•
CSCsz45567
A device running Cisco IOS Software, Cisco IOS XE Software, or Cisco IOS XR Software is
vulnerable to a remote denial of service condition if it is configured for Multiprotocol Label
Switching (MPLS) and has support for Label Distribution Protocol (LDP).
A crafted LDP UDP packet can cause an affected device running Cisco IOS Software or
Cisco IOS XE Software to reload. On devices running affected versions of Cisco IOS XR Software,
such packets can cause the device to restart the mpls_ldp process.
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A system is vulnerable if configured with either LDP or Tag Distribution Protocol (TDP).
Cisco has released free software updates that address this vulnerability.
Workarounds that mitigate this vulnerability are available.
This advisory is posted at:
http://www.cisco.com/warp/public/707/cisco-sa-20100324-ldp.shtml
•
CSCtb13491
A malformed Internet Key Exchange (IKE) packet may cause a device running Cisco IOS Software
to reload. Only Cisco 7200 Series and Cisco 7301 routers running Cisco IOS software with a VPN
Acceleration Module 2+ (VAM2+) installed are affected. Cisco has released free software updates
that address this vulnerability.
This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20100324-ipsec.shtml.
•
CSCtd81849
Symptoms: File copy from active PRE2 to standby PRE2 may fail, or MD5 checksum may fail while
reading a file on the disk.
Conditions: This issue is observed on STI 7.4.0 Compact Flash and PCMCIA Flash cards.
Workaround: There is no workaround.
Open Caveats—Cisco IOS Release 12.2(33)SCB5
•
CSCeh33888
Symptoms: The Cisco uBR7246VXR router reloads with the last reset from the watchdog reset.
Conditions: The router has a Cisco uBR7200-NPE-G1 processor board and is running
Cisco IOS Release 12.3(9a)BC.
Workaround: There is no workaround.
•
CSCsi63649
Symptoms: All the routers are synchronized to one router and display the following message every
10 seconds:
Apr 23 13:33:41.929: %SYS-3-TIMERNEG: Cannot start timer (0x7543D68) with
negative offset (-996736100).
-Process= "TTY Background", ipl= 0, pid= 42
Conditions: This issue occurs when a telnet session is initiated on the router, and then a new telnet
session to a different device is initiated from the telnet session. The exec-timeout does not
disconnect the session even if no keystrokes are issued. When the timeout expires, the error message
is displayed every 10 seconds.
This issue is observed on some Cisco gigabit switch routers (GSRs) running Cisco IOS Release
12.0(28)S, Cisco IOS Release 12.0(31)S, Cisco IOS Release 12.0(32)S, and Cisco IOS Release
12.0(32)SY.
Workaround: Use the show users command to determine which users are logged in through telnet.
Then use clear line X to clear the line, disconnect the users, and stop the error messages.
•
CSCsl50133
Symptoms: The Cisco uBR7246VXR router reloads with following message:
No crashinfo
No tracebacks
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Caveat List for Cisco IOS Release 12.2(33)SCB
Last reload reason: Unknown reason
Last reset from watchdog reset
Conditions: This issue is observed on a Cisco uBR7246VXR (UBR7200-NPE-G1) router running
Cisco IOS Release 12.3(17b)BC4.
Workaround: There is no workaround.
•
CSCsy24676
Symptoms: A false positive is returned on a file system failure, that is, a file operation is returned
as successful even when it has failed.
Conditions: This issue occurs when the file system device returns an error and the code follows the
path in the file system buffer cache where the error is masked and convert it to a success code. This
issue occurs when there is a device error during the write. The device error may be due to bad media
or an OIR.
Workaround: There is no workaround.
•
CSCta03480
Symptoms: Configuration synchronization issue is observed between the Cisco uBR7200-NPE-G1
processor and a line card.
Workaround: Execute the cable dynamic-secret exclude oui command.
•
CSCta28029
Symptoms: Flows with excess information rate (EIR) and maximum information rate (MIR) have
higher throughput than expected.
Conditions: This issue occurs when EIR is higher than MIR and there is congestion on the upstream.
Workaround: Ensure that MIR is greater than EIR.
•
CSCta45075
Symptoms: The show interface multicast-session command may show wrong multicast session
instances.
Workaround: There is no workaround.
•
CSCta77009
Symptoms: A Cisco uBR7200 series universal broadband router reports memory leaks when the
dual stack CPE devices are each running FTP GET and FTP PUT application.
Workaround: There is no workaround.
•
CSCtb20166
Symptoms: Temporary packet drops observed on the line cards in the chassis.
Conditions: This issue occurs due to online insertion and removal (OIR) of a line card in the chassis.
Workaround: There is no workaround.
•
CSCtb74904
Symptoms: During the RP switchover, the service flow counter displays the value 0.
Conditions: This issue occurs during an RP switchover. However, the right service flow is used to
forward the packets; the packets reach the CPEs as well.
Workaround: There is no workaround.
•
CSCtb79237
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Caveat List for Cisco IOS Release 12.2(33)SCB
Symptoms: No system log or SNMP trap is generated when the Common Open Policy Server
(COPS) process that is used for packetcable, fails.
Conditions: This issue occurs in a packetcable environment where the COPS session fails.
Workaround: There is no workaround.
•
CSCtb94400
Symptoms: During reboot, the multicast service flow for the tunnel is not established.
Conditions: This issue occurs during reboot if the cable multicast group-qos default scn
service-class-name aggregate is not configured.
Workaround: Configure the cable multicast group-qos command with default scn
service-class-name aggregate.
•
CSCtc05600
Symptoms: The Cisco uBR7200 series universal broadband router reloads when a software-forced
crash is issued by the SNMP.
Conditions: This issue is observed on the Cisco uBR7200 series universal broadband router running
Cisco IOS Release 12.2(33)SCB3.
Workaround: Filter out the online insertion and removal (OIR) requests from SNMP requests.
•
CSCtc09858
Symptoms: If the tunnel is disabled, the traffic does not stop. However, if the tunnel is disabled when
a “service class name” is not defined for the tunnel, the traffic stops, but reenabling the tunnel does
not restart traffic.
Conditions: This issue is observed when the "service class name" is defined for the tunnel.
Workaround: Stop and start the traffic and remove and add the tunnel group to the interface.
•
CSCtc10117
Symptoms: There is memory leak with pool manager process.
Conditions: This issue is observed when QoS is configured.
Workaround: There is no workaround.
•
CSCtc10231
Symptoms: Upstream power adjustment indication is seen after a cable modem comes online.
Conditions: This issue occurs once every hour when the show cable modem flap command is used.
Workaround: There is no workaround.
•
CSCtc11757
Symptoms: The write operation fails when a disk card is removed while being updated, has some
bad sectors, or does not respond when the card is being updated.
Conditions: This issue is observed in the following two conditions:
1.
The disk card is removed while copying to disk or formatting the disk.
If you then execute the show file system, dir disk, or show disk commands, the system hangs.
2.
During copy to disk operation, it is found that the card has bad sectors or is not responding.
If you then execute the show file system, dir disk, or show disk commands, the system hangs.
Workaround: For condition 1, avoid removing the card when the card is being updated.
For condition 2, replace the bad card with a good card.
•
CSCtc16252
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Caveat List for Cisco IOS Release 12.2(33)SCB
Symptoms: The show inventory command does not display the output until 15 minutes after bootup,
if there is no line card on the system.
Conditions: This issue is observed on the Cisco uBR7200 series universal broadband router running
on the Cisco IOS Release 12.2SC.
Workaround: There is no workaround.
•
CSCtc22435
Symptoms: The docsQosServiceFlowLogTable returns a NULL value.
Conditions: This issue occurs on the Cisco uBR7200 universal broadband router with “Keep QoS11
CM primary service flows counters” feature, while executing the cable primary-sflow-qos11 keep
all command.
Workaround: Unconfigure the feature by executing the cable primary-sflow-qos11 keep all
command.
•
CSCtc55893
Symptoms: The init-tech-ovr command in the load-balancing group (LBG) does not function on the
second logical channel.
Conditions: This issue occurs when the second logical channel is selected as the source channel.
Workaround: There is no workaround.
•
CSCtc60776
Symptoms: Layer 3 traffic cannot be forwarded by a Wideband CM in a non-MTC mode for a certain
period of time after the Cisco CMTS has used the downstream channel change (DCC) to change its
upstream with the initialization technique 1-4. The Wideband CM stays w-online.
Conditions: The issue occurs on wideband CMs. However, CMs running in non-MRC mode are not
affected.
Workaround: Use UCC if the wideband support it.
•
CSCtc60950
Symptoms: The Cisco uBR7225VXR router hangs due to SYS-3-CPUHOG, which is caused by the
EnvMon process.
Conditions: This issue is observed on the Cisco uBR7225VXR router.
Workaround: Disable the EnvMon process using the test c7200 envm off command.
•
CSCtc61466
Symptoms: The cable intercept command on the cable interface is found missing after executing
the following commands.
hw-module slot <x> stop, hw-module slot <x> start for MC28U card
Conditions: This issue is observed on the Cisco uBR7200 with MC28U card running
Cisco IOS Release 12.2S or Cisco IOS Release 12.3.
Workaround: There is no workaround.
•
CSCtc62324
Symptoms: A Cisco uBR7200 Series NPE crashes when dual-stack CPEs get the Layer 3 address
using DHCP/DHCPv6.
Conditions: This issue is observed with more than 300 dual-stack CPEs attempting to get both IPv4
and IPv6 address through DHCP.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Caveat List for Cisco IOS Release 12.2(33)SCB
Workaround: There is no workaround.
•
CSCtc69216
Symptoms: There is an occurrence of a suspicious Any Transport over MPLS (AToM) L2VPN
MPLS Peer Name TLV Parsing Logic, which causes the VCID error.
Conditions: This issue occurs when the AToM l2VPN on the CM configuration file is configured and
the MPLS Peer Name TLV(37) is followed by VCID TLV(38).
Workaround: There is no workaround.
•
CSCtc74969
Symptoms: Unable to set the MIB object “docsIf3MdCfgMultTxChModeEnabled” to true.
Workaround: Use the cable mtc-mode command to set the MIB object
"docsIf3MdCfgMultTxChModeEnabled" to true.
•
CSCtc79306
Symptoms: After configuring the MAC address in the bundle interface, the MAC state of the Cisco
DPC3000 cable modem is found to be w-online and not UB w-online.
Conditions: This issue occurs when the MAC address of the bundle interface is sent to the line card
(LC) when configured under the LC cable interface. This causes the security association (SA) of the
MAC Domain Descriptor (MDD) message and SA of the SYNC message to be different, which
causes the Cisco DPC3000 cable modem to be w-online instead of UB w-online.
•
CSCtc92379
Symptoms: Modems and service-flow counters update incorrectly.
Conditions: This issue occurs when the CM instance is marked offline due to errors during the DCC
rebuild.
Workaround: There is no workaround.
•
CSCtc96090
Symptoms: The polling of IfHCInOctets or IfHCOutOctets objects wrap at the 32-bit marker rather
than the expected 64-bit marker.
Conditions: This issue is observed in Cisco IOS Release 12.2(33)SCB4.
Workaround: There is no workaround.
•
CSCtd04983
Symptoms: The Cisco 7200 VXR series router crashes at cmts_bundle_find_mcast_mac.
Conditions: This issue is observed after the v4 CPE clients rapidly join and leave the multicast
groups.
Resolved Caveats—Cisco IOS Release 12.2(33)SCB5
•
CSCin79116
Symptoms: Issuing show commands push the CPU utilization to 100%.
Conditions: Long running show commands, such as show running-config, show voice call
summary, and show memory summary affect voice call processing adversely, even if they are
periodically suspend.
Workaround: There is no workaround.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 2
•
Caveat List for Cisco IOS Release 12.2(33)SCB
CSCsm13892
Symptoms: A traceback occurs when you reset the line cards and the following output is displayed:
RTTY ISSU Start Nego failed: rc: -287
%ISSU-3-NOT_REG_UNDER_ENTITY: msg session(528938704) is not registered under client
ISSU RTTY Client(2033) and entity(1)
-Traceback= ...
Error in rtty_issu_unregister_sessions at 103
%C7600_PWR-SP-4-DISABLED: power to module in slot 2 set off (Reset)
Conditions: This issue occurs after the Online Insertion and Removal (OIR) for the cards in the
chassis.
Workaround: There is no workaround.
•
CSCsq71492
Symptoms: A Cisco IOS device reloads with an address error or has alignment errors and tracebacks
such as %ALIGN-3-SPURIOUS or %ALIGN-3-TRACE.
Conditions: This issue is most likely to occur when the TACACS+ server (ACS) sends an
"authentication error" when ACS is configured, or when a request timeout occurs. There may be
other AAA or TACACS-related conditions that cause the symptom.
Workaround: There is no workaround.
•
CSCsq75944
Symptoms: A Cisco Catalyst 6500 Series/7600 Series Wireless Services Module (WiSM) reloads
unexpectedly. On the console or in the Route Processor (RP) crashinfo file, the following message
is displayed:
%SYS-2-WATCHDOG: Process aborted on watchdog timeout, process = Per-Second Jobs
Conditions: This issue occurs when the Cisco IOS NetFlow is configured on one of the following:
– Cisco Catalyst 7600 Series Wireless Services Module (WiSM) running Cisco IOS Release
12.2(33)SRC
– Cisco Catalyst 6500 Series Wireless Services Module (WiSM) running Cisco IOS Release
12.2SXH.
Workaround: Disable Cisco IOS NetFlow by using one of the following commands on every
subinterface for which Cisco IOS NetFlow is configured:
no ip flow ingress
no ip flow egress
no ip route-cache flow
•
CSCsw26713
Symptoms: A Cisco uBR7200 series universal broadband router experiences cable interface line
card memory leaks.
Workaround: There is no workaround.
•
CSCsx97071
Symptoms: Multicast packets are not accounted for.
Conditions: This issue occurs when sending multicast traffic. The packets are received properly, but
they are not accounted for.
Workaround: There is no workaround.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Caveat List for Cisco IOS Release 12.2(33)SCB
•
CSCsy14105
Symptoms: The value range of the MIB object “ccmtrCollectionInterval” is not consistent with the
command. The valid range for the MIB object is 15 to 1440, but for the command, the valid range
is 2 to 1440.
Conditions: This issue occurs while setting the MIB object “ccmtrCollectionInterval” using the
SNMP set operation.
Workaround: Set the interval using the command.
•
CSCsz21732
Symptoms: A Cisco router reloads when it is configured for SNMP inform notifications.
Workaround: Disable the SNMP informs with the command no snmp-server host host-address
informs.
•
CSCsz73611
Symptoms: The Cisco CMTS accepts inconsistent “per-SF L2VPN TLV” in the cable modem
configuration file.
Conditions: This issue occurs when:
– Upstream service flow (US-SF) or Downstream Confirmation-to-Receive (DS-CFR)
vendor-specific TLV is specified.
– L2VPN VPNID is specified in the vendor-specific TLV.
– The VPNID does not match any of the top-level L2VPN TLV VPNIDs.
Workaround: There is no workaround.
•
CSCta22034
Symptoms: A traceback is seen at the cmts_delete_entry function after a toggling the CPEs on and
off multiple times.
Conditions: This issue occurs when the CPEs are configured with dual-stack IP and IPv6-only
addresses, and are all configured behind one cable modem.
•
CSCta32291
Symptoms: The NPE of a Cisco uBR7246VXR universal broadband router crashes while running
the multicast protocol.
Conditions: This issue occurs when the router has a Cisco uBR7200-NPE-G1 processor board and
is running Cisco IOS Release 12.2(33)SCB.
Workaround: There is no workaround.
•
CSCta89403
Symptoms: When CPE under legacy cable modems do an IGMP join, and MQoS configuration
requires the multicast session encrypted, the Cisco CMTS sends a MAP reject message to cable
modems. In this case, multicast traffic cannot be sent to the CPE.
Conditions: This issue is observed on the Cisco uBR7200 and Cisco uBR10000 series universal
broadband routers running the Cisco IOS Release 12.2S.
Workaround: There is no workaround.
•
CSCta89599
Symptoms: The entAliasMappingTable does not have entries for the upstreams of the first MAC of
the Cisco uBR-MC28U line cards (for example, for a Cisco uBR-MC28U line card in Slot 3,
upstreams belonging to Cable3/0 are missing).
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Caveat List for Cisco IOS Release 12.2(33)SCB
Conditions: This issue is observed on the Cisco uBR7200 universal broadband routers with Cisco
uBR-MC28U line cards running the Cisco IOS Release 12.2(33)SCB.
Workaround: There is no workaround.
•
CSCtb20975
Symptoms: The cable source_verify command does not work with the bundle interface after sub
bundle test.
Conditions: This issue is observed on the Cisco uBR7200 universal broadband routers running the
Cisco IOS Release 12.2S.
Workaround: There is no workaround.
•
CSCtb28349
Symptoms: If a cable modem sends a Dynamic Channel Change response (DCC-RSP) to confirm
the dcc_req indicating the target channel is exactly the one that the modem gets online and the
technique is larger than 0, the line card crashes when it processes this DCC-RSP.
Conditions: This issue occurs only when the DPC3K modem responds to dcc_rsp to confirm the
dcc_req.
Workaround: Do not use the test command on the DPC3K modem to trigger this issue.
•
CSCtb66848
Symptoms: After upgrade to Cisco IOS Release 12.3(23)BC8, Cisco uBR-MC28U line cards
continue to crash.
Workaround: There is no workaround.
•
CSCtb71251
Symptoms: Attempting to issue a debug cable dhcp command after enabling the logging
discriminator crashes the active and secondary PREs.
Conditions: This issue occurs on both the PRE2 and PRE4.
Workaround: Remove the logging discriminator or do not run the debug cable dhcp command.
•
CSCtb95119
Symptoms: Configuring the RCC template using SNMP leads to the wrong receive channel profile
(RCP) ID.
Conditions: This issue occurs when the RCC template is configured using SNMP.
Workaround: Use CLI to configure the RCC template.
•
CSCtc02317
Symptoms: The DOCS-DIAG-MIB has a timestamp with no timezone information (length is 8).
Conditions: This issue occurs when DOCS-DIAG-MIB items are populated.
Workaround: Clear the current timezone setting to UTC timezone. This causes the timezone offset
to be 0, which can be safely ignored.
•
CSCtc11425
Symptoms: When the same DSG tunnel is configured in different cable interfaces that are slaves to
different bundle interfaces and then the DSG tunnel MAC address is modified, the Cisco uBR10000
and Cisco uBR7200 series universal broadband router stops working.
Conditions: This issue is observed on the Cisco uBR10000 and Cisco uBR7200 series universal
broadband routers running the Cisco IOS Release 12.2(33)SCB.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 2
Caveat List for Cisco IOS Release 12.2(33)SCB
•
CSCtc17575
Symptoms: The cable privacy hotlist cm <a.a.a> command does not block cable modem (CMs)
from coming online.
Conditions: This issue occurs when the CMs do not have the appropriate certificates.
Workaround: There is no workaround.
•
CSCtc22051
Symptoms: Removing nonexistent multicast group configuration (GC) ID on the interface causes
existent multicast GC to be partially lost on the interface; and these existent global multicast GC
cannot be removed and display the following error:
Error: MQOS Group Config found configured on interface(s),
remove from interface first
Conditions: This issue occurs when you incorrectly type the multicast GC ID you want to remove
on interface or if the GC ID you want to remove is larger than any existent GC ID on that interface.
Workaround: There is no workaround.
•
CSCtc22065
Symptoms: Concurrent IGMP requests populate multicast service flow counter with wrong
aggregated MQoS configurations, that is, on CPE side a total 200 Kbps for two multicast sessions,
but only shows 100 Kbps on the Cisco CMTS side.
Conditions: This issue is observed when multiple IGMP join reports arrive on CMTS almost at the
same time.
Workaround: There is no workaround.
•
CSCtc42632
Symptoms: The Cisco uBR7225VXR may hang due to SYS-3-CPUHOG, which is caused by
EnvMon process.
Conditions: This issue is observed on the Cisco uBR7225VXR routers.
Workaround: Disable the EnvMon process with the following command:
Router#test c7200 envm off
•
CSCtc45156
Symptoms: The CM is found stuck in the reject(c) state. If you run the debug cable tlv and debug
cable mac-address <cm-mac> verb commands, the log displays the following:
......
SLOT 4: Oct 8 15:19:59.098
......
SLOT 4: Oct 8 15:19:59.098
......
SLOT 4: Oct 8 15:19:59.098
SLOT 4: Oct 8 15:19:59.098
SLOT 4: Oct 8 15:19:59.098
SLOT 4: Oct 8 15:19:59.098
interface Cable4/0/U5:
CoS/Sflow/Cfr/PHS failed in
CST:
Service Class Name : us_sc
^D
CST:
Service Class Name : ds_sc
^D
CST: Can't find service class name.
CST: Can't find service class name.
CST: MDF DISABLE for CM 0019.474e.e0b6
CST: Registration failed for Cable Modem 0019.474e.e0b6 on
REG-REQ
Conditions: This issue occurs when the CM configuration file includes the service class name
command for US/DS service flows.
Workaround: There is no workaround.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 2
•
Caveat List for Cisco IOS Release 12.2(33)SCB
CSCtc58147
Symptoms: The CM is found stuck in the reject(c) state. If you run the debug cable tlv and debug
cable mac-address <cm-mac> verb commands, the log displays the following:
......
SLOT 4: Oct 15 13:16:23.379: Found Upstream Service Flow TLV
SLOT 4: Oct 15 13:16:23.379:
Service Flow Reference : 1
SLOT 4: Oct 15 13:16:23.379:
Service Class Name String Length 16, Exceeds Limit of
15
SLOT 4: Oct 15 13:16:23.379: PARSER-ERROR: TLV 4 has bad length 16
SLOT 4: Oct 15 13:16:23.379: Primary CoS/Sflow encodings missing. CoSs:0 Sflows[US,
DS]: [1, 0]
SLOT 4: Oct 15 13:16:23.379: Registration failed for Cable Modem 001a.c3ff.d77e on
interface Cable4/0/U1:
CoS/Sflow/Cfr/PHS failed in REG-REQ-MP
Conditions: This issue is observed when the CM configuration file includes service class name of
15 bytes for US/DS service flow.s
Workaround: Change the service class name string to less than 15 bytes.
•
CSCtc85728
Symptoms: The Cisco Broadband Troubleshooter (CBT) 3.3 continuous sweep function fails when
performed on the Cisco uBR10000 series universal broadband routers with PRE4 line cards.
Conditions: This issue is observed on the Cisco IOS Release 12.2(33)SCB4. This issue occurs when
the CISCO-CABLE-SPECTRUM-MIB::ccsSpectrumRequestTable ccsSpectrumRequestOperState MIB object returns a value of 10.
Workaround: There is no workaround.
Open Caveats—Cisco IOS Release 12.2(33)SCB4
•
CSCeh33888
Symptoms: A Cisco uBR7246VXR router may reload with the last reset from watchdog reset.
Conditions: The router has a Cisco uBR7200-NPE-G1 processor board and is running Cisco IOS
release 12.3(9a)BC.
Workaround: There is no workaround.
•
CSCsi43840
Symptoms: The Cisco uBR7246VXR-MC28U line card resets with no crash file being generated in
bootflash.
Conditions: The problem may occur on some Cisco uBR7246VXR router with multiple MC28U
cards.
Workaround: There is no workaround.
•
CSCsl01427
Symptoms: In syntax check mode, if there is a standby in SSO mode, the cts dot1x command does
not work.
Workaround: There is no workaround.
•
CSCsu00342
Symptoms: A drop in multicast streams is seen after changing the IGMP query interval, using the
ip igmp query-interval command.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Caveat List for Cisco IOS Release 12.2(33)SCB
Conditions: This issue occurs in Cisco 7600 chassis with Sup720 engine running Cisco IOS release
12.2(33)SRB. The Cisco 7600 is configured with IGMPV3 and running Source Specific Multicast
(SSM).The multicast stream(s) restore itself within 40-60 seconds.
Workaround: There is no workaround.
•
CSCsu18117
Symptoms: ToS value on multicast packets are being incorrectly overwritten.
Conditions: This issue occurs in routers using Cisco IOS release 12.2(33)SCB.
Workaround: There is no workaround.
•
CSCsv41456
Symptoms: Tracebacks and duplicate ifIndex messages are observed on an MPLS layer interface.
Conditions: This is observed while adding MPLS configuration to a subinterface when the interface
is already configured.
Workaround: Remove the MPLS configuration on the subinterface prior to deleting it.
•
CSCsv41886
Symptoms: CMTS crashes and the following error message is seen when the no ip routing or the
no router bgp xx command is run.
%IPRT-3-IPDB_DEL_ERROR: i_pdb delete error bgp, 4, 210074C8, 20E322E0, 0, 0 -Process=
"IP RIB Update", ipl= 0, pid= 117, -Traceback= 0x61FD7F58 0x62005498 0x62006D24
Conditions: A large number of VRFs are configured and BGP is also configured to support these
VRFs.
Workaround: There is no workaround.
•
CSCsw14622
Symptoms: The last character in the Service Class Name field is dropped in Subscriber Account
Management Interface Specification (SAMIS) records as well as in the SNMP MIB
docsQosServiceFlowLogServiceClassName.
Conditions: This occurs due to deleted service flows.
Workaround: There is no workaround.
•
CSCsw26713
Symptoms: A Cisco uBR7200 series router may experience cable line card memory leaks.
Workaround: There is no workaround.
•
CSCsw37209
Symptoms: Source verification of IPV6 packets does not happen, although the cable ipv6
source-verify command is configured on cable interface of a Cisco uBR7200 router.
Conditions: This issue occurs when Cisco IOS 12.2S release is running on a Cisco uBR7200 router.
Workaround: There is no workaround.
•
CSCsw49188
Symptoms: Cable metering fails and enters a “hung” state.
Conditions: This occurs when the ip tcp timestamp command is configured globally.
Workaround: Do not use the ip tcp timestamp command.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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•
Caveat List for Cisco IOS Release 12.2(33)SCB
CSCsx20724
Symptoms: A Cisco uBR7246VXR router may crash when the cable monitor command is executed
and when a shut command is run on the cable interface.
Conditions: This occurs when the multicast traffic is transmitted using DSG.
Workaround: Do not execute the cable monitor command.
•
CSCsx93502
Symptoms: The multicast traffic rate on one of the cable interfaces is less than the configured QoS
rate limit when two or more cable interfaces are bundled together in a layer 3 bundle interface, and
multicast traffic is sent on the bundle interface.
Workaround: There is no workaround.
•
CSCsy14105
Symptoms: The value range of the MIB object “ccmtrCollectionInterval” is not consistent with the
command. The valid range for MIB object is from 15 to 1440, but for the command, the range is
from 2 to 1440.
Conditions: This issue occurs while setting the MIB object “ccmtrCollectionInterval” using the
SNMP set operation.
Workaround: Set the interval using the command.
•
CSCsy37677
Symptoms: A crash is observed on the CMTS.
Conditions: This issue is seen when ETDB show commands are paused and multicast sessions are
removed because a CPE leaves or a CM goes offline.
Workaround: Set the term length to 0 for not pausing while displaying the command.
•
CSCsy56666
Symptoms: The cable primary-sflow-qos11 keep snmp-only command is not working as expected
and the primary service flow packet/byte count is not retained after the cable modem is reset.
Conditions: This issue is observed in DOCSIS 1.1 specific modems after reset.
Workaround: Clear the cable modem counters associated with primary service flows.
•
CSCsy78163
Symptoms: A Cisco uBR7200 series router may experience spurious memory access when the
hw-module slot x stop and hw-module slot x start commands are executed.
Workaround: There is no workaround.
•
CSCsz23477
Symptoms: A Cisco uBR7200 series router may crash due to igmp timer timeout or igmp leaves
when the show interfaces multicast-session command is executed.
Workaround: There is no workaround.
•
CSCsz28000
Symptoms: Multicast sessions are not created for static group when the Group Config parameters
are changed.
Workaround: Remove the static group by running the ip igmp static-group command and reapply
the configuration.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Caveat List for Cisco IOS Release 12.2(33)SCB
•
CSCsz31339
Symptoms: The downstream packet source MAC address is corrupted when a cable intercept is
configured on the cable interface.
Workaround: There is no workaround.
•
CSCsz37070
Symptoms: A Cisco uBR7246VXR router may report fan tray failure when the environmental
temperature is lesser than 0 degrees C.
Workaround: There is no workaround.
•
CSCsz59845
Symptoms: A Cisco uBR7246VXR router may report multiple memory leaks when the show
memory debug leak command is executed.
Workaround: There is no workaround.
•
CSCsz67716
Symptoms: The “Gate Report State” counter in the output of the show packetcable cms verbose
command does not increment for PacketCable Multimedia (PCMM) policy servers.
Conditions: This issue is seen for PCMM policy servers.
Workaround: There is no workaround.
•
CSCsz73611
Symptoms: CMTS will accept inconsistent “per-SF L2VPN TLV” in the cable modem configuration
file.
Conditions: This is seen in the following conditions:
– Upstream service flow (US-SF) or Downstream Confirmation-to-Receive (DS-CFR) Vendor
Specific TLV is specified.
– L2VPN vpnid is specified in the Vendor Specific TLV.
– The Vpnid does not match any of the top-level L2VPN TLV vpnid.
Workaround: There is no workaround.
•
CSCsz75180
Symptoms: CMTS may crash when an MPLS subinterface is deleted.
Workaround: Do not delete the subinterface.
•
CSCsz78872
Symptoms: A Cisco uBR7246VXR router with NPE G2 processor has wrongly assigned a common
MAC address to two ports instead of unique MAC addresses.
Workaround: There is no workaround.
•
CSCta03480
Symptoms: Configuration synchronization issue has been observed between the NPE-G1 processor
and a line card.
Workaround: Execute the cable dynamic-secret exclude oui command.
•
CSCta05721
Symptoms: A Cisco uBR7200 series router may report very high and unexpected multicast traffic
on a default multicast service flow.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 2
Caveat List for Cisco IOS Release 12.2(33)SCB
Workaround: There is no workaround.
•
CSCta07903
Symptoms: The EPC2100 may reset due to overload of the upstream traffic.
Symptoms: This issue was observed on a Cisco uBR7200 series router with the Cisco MC5x20H or
MC8x8 line cards.
Workaround: Configure ingress-noise-cancellation or disable rate-adapt.
•
CSCta21291
Symptoms: A Cisco uBR7246VXR router wrongly displays the CPE MAC address rather than the
MAC address of the cable modem when the show cable modem command is run.
Workaround: There is no workaround.
•
CSCta32291
Symptoms: The NPE of a Cisco uBR7246VXR router may crash while running the multicast
protocol.
Conditions: The router has a Cisco uBR7200-NPE-G1 processor board and is running Cisco IOS
release 12.2(33)SCB.
Workaround: There is no workaround.
•
CSCta45075
Symptoms: The show interface multicast-session command may show wrong multicast session
instances.
Workaround: There is no workaround.
•
CSCta49190
Symptoms: CMTS does not add IP address to the relayed DHCP packets.
Workaround: There is no workaround.
•
CSCta77009
Symptoms: A Cisco uBR7200 series router may report memory leaks when the dual stack CPE
devices are each running FTP GET and FTP PUT application.
Workaround: There is no workaround.
•
CSCtb05948
Symptoms: CMTS watchdog timeout crash is observed at cmts_address_filter or cmts_cm_lookup.
Workaround: Downgrade the image version to Cisco IOS Release 12.2(33)SCB2.
Resolved Caveats—Cisco IOS Releases 12.2(33)SCB4
•
CSCsh11476
Symptoms: A Cisco uBR7246VXR router may crash after displaying the following watchdog
timeout error message:
%SYS-2-WATCHDOG: Process aborted on watchdog timeout, process = CMTS METERING EXPORT
Process.
Conditions: This issue is observed when the router crashes during the process of writing a file to the
flash disk.
Workaround: There is no workaround.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 2
Caveat List for Cisco IOS Release 12.2(33)SCB
•
CSCsj45943
Symptoms: The no ip dhcp relay info policy removal pad config command has no effect.
Workaround:
•
1.
Copy the running config to the tftp or ftp server and edit it so that this config line is removed.
2.
Copy this edited configuration to nvram:startup-config.
3.
Reload the router.
CSCsx20927
Symptoms: The startup configuration information for a standby RP is not displayed.
Workaround: There is no workaround.
•
CSCsx70889
Cisco devices running affected versions of Cisco IOS Software are vulnerable to a denial of service
(DoS) attack if configured for IP tunnels and Cisco Express Forwarding.
Cisco has released free software updates that address this vulnerability.
This advisory is posted at
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20090923-tunnels.
•
CSCsy07555
Cisco IOS devices that are configured for Internet Key Exchange (IKE) protocol and certificate
based authentication are vulnerable to a resource exhaustion attack. Successful exploitation of this
vulnerability may result in the allocation of all available Phase 1 security associations (SA) and
prevent the establishment of new IPsec sessions.
Cisco has released free software updates that address this vulnerability.
This advisory is posted at
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20090923-ipsec
•
CSCsy15227
Cisco IOS Software configured with Authentication Proxy for HTTP(S), Web Authentication or the
consent feature, contains a vulnerability that may allow an unauthenticated session to bypass the
authentication proxy server or bypass the consent webpage.
There are no workarounds that mitigate this vulnerability.
This advisory is posted at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20090923-auth-pro
xy
•
CSCsy85008
Symptoms: The ifInOctets reported erroneous CPU usage.
Conditions: This issue is observed on the Cisco uBR7200 series router.
Workaround: There is no workaround.
•
CSCsz15590
Symptoms: A Cisco uBR7246VXR router may hang after it is reset with large downstream traffic
passing through the Gigabit Ethernet line card.
Conditions: The issues is observed on a Cisco uBR7200 series that has large traffic passing through
the Gigabit Ethernet line card.
Workaround: Directly load the image by rommon.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 2
•
Caveat List for Cisco IOS Release 12.2(33)SCB
CSCsz25465
Symptoms: A few cable modems may be stuck at reject(pk) or w-reject(pk) permanently during OIR
or hw-module reset.
Workaround: Power cycle the cable modem so that the state changes to online(pt) or w-online(pt)
state.
•
CSCsz44822
Symptoms: A Cisco uBR7200 series router may crash indicating the following error.
*Apr 22 22:40:50.363: %SYS-2-CHUNKBADREFCOUNT: Bad chunk reference count, chunk
92B3A70 data 92BB3C4 refcount FFFFFFFF alloc pc 69AFF4. -Process= "CMTS SID mgmt
task", ipl= 3, pid= 74
-Traceback= B5CB14 B5D334 CAB9F0 CABE1C 69BC50 73A850 762C38 641FF4 641C4C 641E80
646CE0 917318
chunk_diagnose, code = 3
chunk name is CMTSPCTYPE
Conditions: The cable helper-address command is configured to be the same as the bundle IP
address.
Workaround: There is no workaround.
•
CSCsz52508
Symptoms: The test cable dcc frequency command moves one modem to target frequency does not
work when the upstream channel ID of the modem does not belong to the target downstream
channel.
Conditions: This issue only affects test cable dcc frequency command.
Workaround: Use test cable dcc frequency command to move the modem where the upstream
channel ID belongs to the target downstream channel.
•
CSCsz52617
Symptoms: The cdxIfUpChannelAvgUtil reports incorrect numbers when rate adapt is enabled on
the router.
Conditions: This is seen when using SNMP to poll cdxIfUpChannelAvgUtil with rate adapt enabled.
Workaround:
1) Use CLI to obtain numbers
2) Disable rate-adapt
•
CSCsz60620
Symptoms: A Cisco uBR7246VXR router may experience a silent reload.
Workaround: There is no workaround.
•
CSCsz66321
Symptoms: Static routes that are configured may be lost after reloading the Cisco uBR7225VXR
router.
Workaround: Re-configure the ip route command after reloading the router.
•
CSCsz67961
Symptoms: The PacketCable Multimedia (PCMM) calls fail as the Gate Set Ack/Err is not received.
Conditions: This issue is seen in PCMM calls with a small value used for timer T1 (such as 1
second).
Workaround: Use larger values for the PCMM timer T1 (at least 5 seconds).
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 2
Caveat List for Cisco IOS Release 12.2(33)SCB
•
CSCsz74267
Symptoms: A Cisco uBR7225VXR router may fail to boot up at PCI Error Interrupt.
Workaround: Boot the system using the Cisco IOS image directly.
•
CSCsz76564
Symptoms: The cable primary-sflow-qos11 keep snmp-only command is not working as expected
and the primary service flow packet/byte count is not retained after the cable modem is reset.
Conditions: This issue is observed in DOCSIS 1.1 specific modems after reset.
Workaround: Clear the cable modem counters associated with primary service flows.
•
CSCta16416
Symptoms: A Cisco MC28U line card crashes with Data Bus Error exception.
Workaround: There is no workaround.
•
CSCta31219
Symptoms: Dropped or delayed DOCSIS MAC management packets resulted in problems such as
call failures.
Conditions: Combination of Multicast QoS configuration with BPI+ encryption coupled with the
blocking of IGMP for those same multicast groups.
Workaround: Do not configure multicast QoS with BPI+ for groups where IGMP is blocked.
•
CSCta39725
Symptoms: After the CMTS reload, samis-cable metering source-interface configuration is removed
from the running configuration.
Conditions: This issue is observed on a Cisco uBR7200 series router running Cisco IOS Release
12.2(33)SCB.
Workaround: Re-configure the cable metering source-interface.
•
CSCta62911
Symptoms: The ip dhcp relay info policy removal pad command is not ISSU compliant.
Conditions: ISSU cannot be conducted and the CMTS must be reloaded.
Workaround: There is no workaround.
•
CSCta67001
Symptoms: CMTS crashes when removing the flash card.
Workaround: There is no workaround.
•
CSCta83557
Symptoms: The cable modem information is not displayed when executing the show cable modem
command after using the DCC command.
Workaround: There is no workaround.
Open Caveats—Cisco IOS Release12.2(33)SCB3
•
CSCsz07955
Symptoms: CMTS crashes when using on a bad PCMCIA flash card.
Conditions: This issue occurs when accessing a bad PCMCIA flash card using SNMP or dir.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 2
Caveat List for Cisco IOS Release 12.2(33)SCB
Workaround: Avoid using a bad PCMCIA flash card.
•
CSCsi43840
Symptoms: The Cisco uBR7246VXR-MC28U card resets with no crash file being generated in
bootflash memory.
Conditions: This issue occurs on some Cisco uBR7246VXR routers with multiple Cisco
UBR-MC28U cards.
Workaround: There is no workaround.
•
CSCsz25465
Symptoms: Upon online insertion and removal (OIR) of the line card or executing a hw-module
reset command, some of the cable modems get stuck at reject (pk) state or w-reject (pk) state
permanently.
Conditions: This issue in seen when Baseline Privacy Interface (BPI) is enabled.
Workaround: Power cycle the cable modem to bring it to online(pt) or w-online (pt) state.
•
CSCsy14105
Symptoms: The value range of MIB object “ccmtrCollectionInterval” is not consistent with the
command range. The valid value range is set at 15-1440 for MIB object and the command value
range is set at 2-1440.
Conditions: This issue is seen while setting the value range of the MIB object
“ccmtrCollectionInterval” using the SNMP set operation.
Workaround: Set the interval using the cable metering destination command.
•
CSCsy85008
Symptoms: A The “ifInOctets” counter values closely follows an abnormal roll-over after a normal
roll-over.
2009-03-24
2009-03-24
2009-03-24
2009-03-24
2009-03-24
2009-03-24
15:15:39
15:20:39
15:25:46
15:31:08
15:35:39
15:41:11
-
4076758789
524459145
726658247
939124784
583325062
801102043
<========== a normal roll-over
<===========an abnormal roll-over
Conditions: This issue is seen when there is a roll-over between the first and second polls on
“ifInOctets” list. This is a normal roll-over for a 32-bit counter. However, there is an abnormal
roll-over between the fourth and fifth polls.
Workaround: There is no workaround.
•
CSCsv82736
Symptoms: The modem cannot come online on the upstream. This issue was first detected in
Cisco IOS Release 12.3(21a)BC6. The modem reaches the init(r1) or init(r2) state but, fails to
proceed further.
Conditions: This issue appeared at the site in Cisco IOS Release 12.3(21a)BC6. It is a a very rare
condition.
Workaround: Use shutdown or no shutdown command.
•
CSCsy79015
Symptoms: The Cisco uBR7200 router crashes during IPC processing.
Conditions: This issue is seen when one or more debug commands are enabled that can cause a large
number of messages are printed.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Caveat List for Cisco IOS Release 12.2(33)SCB
Workaround: Disable the debug commands.
•
CSCsw26713
Symptoms: A memory leak is observed.
Conditions: This issue occurs when:
– Creating tlv_encode_fragm and no CMs exist
– Creating a init_npe_packet_system
– Changing the upstream DOCSIS mode to ATDMA first and then changing it to another mode
(like tdma): cmts_mac_sched_build_ugs_lookup_tables
– Configuring crypto on NPE and enabling BPI to make CMs online(pt):
crypto_process_root_cert_s and crypto_certc_get_name_der_from_cert_internal
Workaround: There is no workaround.
•
CSCsw37209
Symptoms: Source verification of IPv6 packets does not occur even when the cable ipv6
source-verify command is configured on the cable interface of the Cisco uBR7200 router.
Conditions: This issue occurs when Cisco IOS Release 12.2S is running on the Cisco uBR7200
router.
Workaround: There is no workaround.
•
CSCsz31339
Symptoms: The downstream packet source MAC address is corrupted. The expected source address
should be the MAC address of the bundle interface.
Conditions: This issue occurs in when any cable intercept is configured on the cable interface.
Workaround: There is no workaround.
•
CSCso71883
Symptoms: The string command fails to run in the Cisco IOS Tcl shell.
Conditions: This issue occurs while running string commands in the Cisco IOS Tcl shell.
Workaround: There is no workaround.
•
CSCsy78163
Symptoms: A spurious memory access is observed on the CMTS after issuing hw-module slot x
stop and hw-module slot x start commands.
Conditions: This issue is seen after issuing hw-module slot x stop and hw-module slot x start
commands.
•
CSCsy56666
Symptoms: The primary service flow packet and byte count is not retained once after the cable
modem is reset.
Conditions: This issue is seen in DOCSIS 1.1 provisioned modems.
Workaround: Remove DOCSIS 1.0 from the cable modem and ensure that the service flow flag for
DOCSIS 1.1 (cmts_qos11_primary_sf_keep) is not set. Clear the cable modem counters associated
with primary service flows.
•
CSCsu18117
Symptoms: The ToS value on multicast packets are incorrectly overwritten.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 2
Caveat List for Cisco IOS Release 12.2(33)SCB
Conditions: This issue occurs in routers using Cisco IOS Release 12.2(33)SCB.
Workaround: There is no workaround.
•
CSCsz72547
Symptoms: The Cisco uBR7200 router reboots automatically.
Conditions: This issue was first seen on the Cisco uBR7246VXR (Cisco uBR7200-NPE-G1) router
running Cisco IOS Release12.3(21a)BC4.
Workaround: There is no workaround.
•
CSCsz59845
Symptoms: Multiple memory leaks are observed on issuing show memory debug leak command
on the Cisco uBR7246VXR line card.
Conditions: This issue occurs when issuing the show memory debug leak command on the
Cisco uBR7246VXR line card.
Workaround: There is no workaround.
•
CSCsy37677
Symptoms: A crash is observed on the CMTS.
Conditions: This issue is seen in cases ETDB show commands are paused and multicast sessions
removed because a Customer Premises Equipment (CPE) issue a leave request or CM goes offline.
Workaround: Set the term length to “0” to prevent the pause while displaying the command.
•
CSCsz73611
Symptoms: CMTS will accept inconsistent “per-SF L2VPN TLV” in the cable modem configuration
file.
Conditions: This is when the:
– Upstream service flow (US-SF) or Downstream Confirmation-to Receive (DS-CFR)
vendor-specific TLV is specified
– L2VPN vpnid is specified in the vendor-specific TLV
– Vpnid does not match any of the top level L2VPN TLV vpnid.
Workaround: There is no workaround.
•
CSCsz28000
Symptoms: When modifying the group configuration for multicast QoS, the static-group session
does not reevaluate when a multicast session requires to be populated.
Conditions: This issue is seen while modifying the group configuration.
Workaround: Unconfigure the ip igmp static-group command and re-apply.
•
CSCsx93502
Symptoms: When two or more cable interfaces are bundled together in the Layer3 interface and
multicast traffic with Qos configured is sent on this interface, the multicast traffic rate on one of the
cable interfaces is found to be lesser than the configured QoS rate limit.
Conditions: This issue is seen when multicast QoS is configured and two or more cable interfaces
are bundled together.
Workaround: There is no workaround.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
2-34
Chapter 2
Caveat List for Cisco IOS Release 12.2(33)SCB
•
CSCsz23477
Symptoms: While displaying the multicast session entries using the show interface
multicast-session command, one or more sessions could be disrupt due to igmp timer timeout or
igmp leaves. This may lead to a CMTS crash while the show interfaces multicast-session command
displays the corresponding session details.
Conditions: This issue is seen while displaying the multicast session entries.
Workaround: There is no workaround.
•
CSCsz67716
Symptoms: The “Gate Report State” counter in the output of the show packetcable cms verbose
command does not increment for Packetcable Multimedia (PCMM) policy servers.
Conditions: This issue is seen in PCMM policy servers.
Workaround: There is no workaround.
•
CSCsz67961
Symptoms: The PacketCable Multimedia (PCMM) calls fail when Gate Set Ack/Err is not received.
Conditions: This issue is seen in PCMM calls with smaller values used for the timer T1 (such as 1
second).
Workaround: Use larger values for the PCMM timer T1 (at least 5 seconds).
•
CSCsz15590
Symptoms: When large traffic passes through the Gigabit Ethernet interface, takes a long time to
load the bootimage(kboot).
Conditions: This issue is seen when large traffic passes through the Gigabit Ethernet interface
(>200kbps).
Workaround: Directly load the image using ROMmon.
•
CSCsz66321
Symptoms: Static routes configured may be lost after reloading the Cisco uBR7225VXR router,
even when the “ip route..” information is present in the running configuration.
Conditions: This issue is seen only on the Cisco uBR7225 router.
Workaround: Reconfigure the “ip route..” after reloading the Cisco uBR7225VXR router.
•
CSCsu00342
Symptoms: Multicast streams drop, after changing the “ip igmp query-interval”. The following
sample shows the output before and after the change:
Before the change:
Router#show ip mroute
<<..skipped..>>
(, ), 01:09:04/00:02:52, flags: sTI
Incoming interface: TenGigabitEthernet1/1, RPF nbr 10.x.x.x, RPF-MFD
Outgoing interface list:
Vlan50, Forward/Sparse, 00:48:45/00:02:52, H <<====
After the change:
Router#show ip mroute
<<..skipped..>>
(, ), 01:28:19/00:02:36, flags: sPT
Incoming interface: TenGigabitEthernet1/1, RPF nbr 10.x.x.x, RPF-MFD
Outgoing interface list: Null <<====
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 2
Caveat List for Cisco IOS Release 12.2(33)SCB
Conditions: This issue is was first seen in a Cisco 7600 chassis with Supervisor 720 engine running
Cisco IOS Release 12.2(33)SRB.
Workaround: There is no workaround.
•
CSCeh33888
Symptoms: A Cisco uBR7246VXR router may reload with the last reset from watchdog reset.
Conditions: This issue is seen on a router having a Cisco uBR7200-NPE-G1 processor board and is
running Cisco IOS Release 12.3(9a)BC.
Workaround: There is no workaround.
•
CSCsw49188
Symptoms: Cable metering fails and enters a “hung” state.
Conditions: The issue occurs when the “ip tcp timestamp” option is configured globally.
Workaround: Do not use the “ip tcp timestamp” option.
•
CSCsz31811
Symptoms: The CMTS causes a high CPU utilization on the IP Detail Record (IPDR) and Subscriber
Account Management Interface Specification (SAMIS) collector by sending multiple records for a
flow with the same creation time.
Conditions: The service flow export and service flow deletion occur at the same time.
Workaround: There is no workaround.
•
CSCsw14622
Symptoms: For deleted service flows associated with PCMM calls the last character in the Service
Class Name field is dropped in the SAMIS records and in the SNMP MIB object
“docsQosServiceFlowLogServiceClassName”.
Conditions: This issue is seen when the dynamic service flows associated with PCMM calls are
deleted. The last character is found missing from the service class name in the MIB object
“docsQosServiceFlowLogServiceClassName” and SAMIS records.
•
CSCsx20724
Symptoms: When multicast traffic is run using the DOCSIS Set-top Gateway (DSG) and the cable
monitor command is configured, the pool manager process causes a huge memory leak. When a
shutdown command is issued on the cable interface, the Cisco uBR7246VXR router crashes.
Conditions: The issue occurs because service-policy output command is configured on the
FastEthernet interface which sends the DOCSIS packets out of the Cisco uBR7246VXR router using
cable monitor.
Workaround: Do not configure the service-policy output command on the FastEthernet interface if
the interface is used by cable monitor.
Resolved Caveats—Cisco IOS Release 12.2(33)SCB3
•
CSCsy79541
Symptoms: The Cisco uBR7200 router hangs when enabling the cable monitor command.
Conditions: This issue is seen when the cable monitor is configured on the CMTS for an unknown
MAC address.
Workaround: Use the cable intercept command on the Cisco uBR7200 router.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Chapter 2
Caveat List for Cisco IOS Release 12.2(33)SCB
•
CSCsw52539
Symptoms: The cable metering collection enters the “write-error” state and does not recover.
Conditions: This issue occurs when cable metering is configured with the default TCP parameters.
Workaround: Enabling the ip tcp path-mtu-discovery command may help prevent occurrences of
the issue. Running the test cable metering abort command clears the “hung” state and allows the
next iteration of cable metering to occur.
•
CSCsz63000
Symptoms: The CMTS fails to send SAMIS data to the IPDR collector, though the TCP connection
is up.The show ipdr session command reports unacknowledged data, and the show process event
command of IPDR process reports the process is in “sleep”.
Conditions: This issue occurs when IPDR and cable metering collectors are enabled.
Workaround: Disable and re-enable IPDR.
•
CSCsz22819
Symptoms: When using a wideband-SIP, the total count for the SPA in slot 1/1/0 is a sum of both
SPAs, rather than the sum of itself. This can be seen using the show hw-module bay all counters
rf-channel command.
Conditions: This issue is seen in the wideband-SIP when more than one SPAs are inserted in one SIP.
Workaround: There is no workaround.
•
CSCsy81766
Symptoms: The Enhanced Interior Gateway Routing Protocol (EIGRP) reports bad checksum.
Conditions: This issue is seen when EIGRP adjacency is configured over a Generic Routing
Encapsulation (GRE) tunnel.
Workaround: Disable PXF on the Cisco CMTS router.
•
CSCsy22359
Symptoms: Tracebacks are seen with the following error after reloading the CMTS, during the
initialization of downstream parameters:
*Mar 5 18:56:18.583 PST: %CR10K_CLNT-3-CR10K_CLNT_ASSERT_FAILED:
Assert failed at line 185 from func cr10k_docsis_get_ses_info in file
../src-cmts/cr10k/client-docsis/cr10k_docsis.c for client 0
Conditions: The value of “code mc_idx” can range from 0 to 119. However, a value of 120 was
observed on a Cisco uBR7200 router, and the unblocked IPC insertion from the RP to line card failed
by producing traces.
Workaround: Use the reg_add function to send RP to the line card IPC.
•
CSCsx79863
Symptoms: The calculated channel utilization percent is inaccurate. The short term utilization seen
via the output of the command show interface cable X/Y/Z mac-scheduler, shows “Avg upstream
channel utilization” value much larger than the actual channel usage. The longer term utilization
used by the load-balancing module may also be much larger than the actual channel usage.
Conditions: This issue is seen when “rate-adapt” is configured for a particular upstream channel,
under certain configured conditions. The MAC scheduler for that upstream allocates additional data
grants to one or more cable modems in a given MAP message. When the data grants go unused by
cable modems, the scheduler makes skewed utilization calculations.
Workaround: There is no workaround.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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•
Caveat List for Cisco IOS Release 12.2(33)SCB
CSCsz53800
Symptoms: Multiple memory leaks are observed while issuing the show memory debug leak
command on the line card.
Conditions: The condition is unknown.
Workaround: There is no workaround.
•
CSCsx20894
Symptoms: The Cisco uBR7246VXR router incorrectly reports “docsIfDocsisBaseCapability” of
“4”, that is, the DOCSIS 3.0 support.
Conditions: This issue occurs in Cisco uBR7246VXR routers running the
Cisco IOS Release 12.2(33)SCB.
Workaround: There is no workaround.
•
CSCsx70840
Symptoms: The modems end up in reject (m) state and the log contains the following error on a
Cisco uBR7200 series router, after reloading it with Cisco IOS Release12.2(33)SCB,
*Dec 26 17:42:09.948: %UBR7200-4-REG_REJ_AUTH_FAIL_CMTS_MIC_INVALID:
<133>CMTS[DOCSIS]:<73000500>
Registration rejected authentication failure: CMTS MIC invalid
. CM Mac Addr <0019.5e38.96ca>
Conditions: This issue is seen when the cable shared-secret command is configured on the
interface.
Workaround: One of the following workarounds may be used:
•
1.
Reconfigure the shared secret command, after bootup; the devices may go offline after an
unexpected reload, but the security is maintained.
2.
Configure the cable dynamic-secret command if it is practical in the present network design,
and remove the cable shared-secret command; This utilizes other code paths and maintains
security.
3.
Remove the cable shared-secret command from the running configuration, write to memory,
and then replace the cable shared-secret command; this creates a “resilient” fault though it less
secure. The system recovers automatically and all modems go into the online(pt) state, but there
theft of service may occur. The devices that come online after an unexpected reload are not as
secure and slightly harder to manage.
CSCsv16701
Symptoms: Power supply is not displayed in the output of the show inventory command on the
Cisco uBR7246VXR platform.
Conditions: This issue occurs on Cisco uBR7246VXR routers.
Workaround: Use the show environment command to see the power supply.
•
CSCsx16152
Symptoms: Erroneous routing prefixes may be added to the routing table.
Conditions: This issue is seen when the DHCPv6 relay feature is enabled and a router receives a
normal DHCPv6 relay reply packet, which leads to an erroneous route being added to the routing
table.
Workaround: There is no workaround.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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•
CSCsz12821
Symptoms: The CMTS ignores IGMPv3 join message.
Conditions: This issue occurs when IGMPv3 is configured on the bundle interface and
SSM-mapping is configured on CMTS. The ignored IGMPv3 join is *,G join with group address in
the SSM range.
Workaround: Use either S,G IGMPv3 join or use *,G IGMPv2 join message.
•
CSCsy48561
Symptoms: After configuring a multicast group configuration (GC) and then assigning the GC to the
cable interface, a hw-module slot x stop command triggers the CMTS to crash.
Conditions: The issue is seen when the hw-module slot x stop command is executed.
•
CSCsz21661
Symptoms: The Gigabit Ethernet output for a 24 downstream wideband and narrowband SPA can
get isolated from the port after repeated online insertion and removal (OIR) of the SPA within a short
duration of time.
Conditions: This issue is seen with repeated OIR of the SPA within a short duration of time and with
repeated line protocol off/on within a short duration of time.
Workaround: Reload the SPA using the hw-module bay reload command.
•
CSCsz05250
Symptoms: When setting a CA certificate to 'untrusted', any CM that uses an issuer of the same name
is rejected, including legitimate modems.
Conditions: This issue is caused due to a newly created software “Haxorware”, which generates CA
certificates that conflict with existing CA certificates.
Workaround: The recommended method is to disallow self-signed certificates on the CMTS and
explicitly set specific self-signed certificates to “trusted”. This is the 'opt-in' model, rather than a
'opt-out' model.
•
CSCsv64884
Symptoms: The SNMP v3 walk with authentication does not complete against a virtual switch
system (VSS).
Conditions: This issue occurs on a SNMP v3 walk with authentication on a VSS.
•
CSCsw14433
Symptoms: On the Cisco CMTS router, during RP module runversion of the ISSU upgrade process,
the IPC connection between RP and cable line cards may take additional seconds to come up.
Conditions: This issue occurs during RP module runversion.
Workaround: There is no workaround.
•
CSCsx77978
Symptoms: The downstream load is not balanced when the downstream load balancing group (DS
LB) is configured with us-across-ds policy.
Conditions: This issue is seen when us-across-ds policy is configured on the DS LB group.
Workaround: Do not configure us-across-ds policy on the DS LB group.
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•
Caveat List for Cisco IOS Release 12.2(33)SCB
CSCsy28426
Symptoms: When a wideband interface with w-online modems on it and a primary channels is shut
down, an error is seen in the load-balancing modem counter when these modems go offline. This
issue has an affect on the load balancing.
Conditions: The issue occurs when a wideband interface with w-online modems and a primary
channel is shut down.
Workaround: Configure the primary channel of the modem to be excluded from the channels in
wideband interface.
•
CSCsw24542
Symptoms: A crash occurs due to a bus error after displaying the following error messages:
%DATACORRUPTION-1-DATAINCONSISTENCY: copy error,
%ALIGN-1-FATAL: Illegal access to a low address < isdn function decoded>
Conditions: This crash occurs on a Cisco 3825 router running Cisco IOS Release12.4(22)T with
active ISDN connections. The Cisco 3825 router crashed while being monitored using an SNMP
Get program and reloaded after some time.
Workaround: There is no workaround.
•
CSCsw35917
Symptoms: The SNMP route processor (RP) agent does not send logged SP syslog messages as
SNMP trap messages.
Conditions: This issue occurs in routers running Cisco IOS Release 12.2(18)SXF.
Workaround: There is no workaround.
•
CSCsu64215
Symptoms: The ip tcp adjust-mss command results in packet loss for non-TCP traffic.
Conditions: This issue is seen when using the ip tcp adjust-mss command.
Workaround: Disable the ip tcp adjust-mss command on all interfaces in the device. This may cause
higher CPU utilization due to fragmentation and reassembly in certain tunnel environments where
the command is intended to be used.
•
CSCsu31549
Symptoms: When a router (with a large-scaled configuration) is provisioned to perform an RP
module failover, a PXF crash occurs (for example, switchover pxf restart 1 0), which results in
missed IPC keepalives and a large crash information file is being written causing unexpected
behavior, including line card reloads.
Conditions: This issue is seen in a router with a large configuration that is configured with
redundancy, mode switchover, main-cpu, and switchover pxf restart 1 0.
•
CSCsy73726
Symptoms: The cable metering options “flow-aggregate” and “cpe-list-suppress” disappear from the
cable metering configuration if cable metering data-per-session x timer y command is configured.
Conditions: This issue is seen in the cable metering command.
Workaround: Reconfigure the metering options “flow-aggregate” and “cpe-list-suppress” in the
command.
•
CSCsv87997
Symptoms: The DHCPv6 relay process crashes on the active RP.
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Conditions: The condition is unknown.
Workaround: There is no workaround.
Open Caveats—Cisco IOS Release 12.2(33)SCB2
•
CSCeh33888
Symptoms: A Cisco uBR7246VXR router may reload with the last reset from watchdog reset.
Conditions: This issue occurs if the router has a Cisco uBR7200-NPE-G1 processor board and is
running Cisco IOS Release 12.3(9a)BC.
Workaround: There is no workaround.
•
CSCsi43840
Symptoms: The Cisco uBR7246VXR-MC28U line card resets with no crash file being generated in
bootflash.
Conditions: The issue may occur on some Cisco uBR7246VXR routers with multiple Cisco
uBR-MC28U cards.
Workaround: There is no workaround.
•
CSCsu00342
Symptoms: A drop in multicast streams is seen after changing the IGMP query interval, using the
ip igmp query-interval command.
Conditions: This issue occurs in the following conditions:
– Cisco 7600 chassis with Sup720 engine is running Cisco IOS Release 12.2(33)SRB
– Cisco 7600 is configured with IGMPV3 and is running Source Specific Multicast (SSM).
– Multicast stream(s) restore themselves within 40-60 seconds.
Workaround: There is no workaround.
•
CSCsu18117
Symptoms: The ToS values on multicast packets are incorrectly overwritten.
Conditions: This issue occurs in routers using Cisco IOS Release 12.2(33)SCB.
Workaround: There is no workaround.
•
CSCsv16701
Symptoms: Power supply is not displayed in the output of the show inventory command on the
Cisco uBR7246 VXR platform.
Conditions: This issue occurs on Cisco uBR7246VXR routers.
Workaround: Use the show environment command to see the power supply.
•
CSCsv82736
Symptoms: The cable modem cannot come online on the upstream. This issue was first detected in
Cisco IOS Release 12.3(21a)BC6. The modem reaches the init(r1) or init(r2) but, fails to proceed
further.
Conditions: This issue was seen at the customer site for Cisco IOS Release 12.3(21a)BC6. It is a
rare condition.
Workaround: Use the shut/no shut command.
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•
Caveat List for Cisco IOS Release 12.2(33)SCB
CSCsw14622
Symptoms: The last character in the Service Class Name field is dropped in Subscriber Account
Management Interface Specification (SAMIS) records as well as in the SNMP MIB
docsQosServiceFlowLogServiceClassName.
Conditions: This occurs for deleted service flows.
Workaround: There is no workaround.
•
CSCsw37209
Symptoms: Source verification of IPv6 packets does not occur even when the cable ipv6
source-verify command is configured on the cable interface of the Cisco uBR7200 router.
Conditions: This issue occurs when Cisco IOS Release12.2S is running on the Cisco uBR7200
router.
Workaround: There is no workaround.
•
CSCsw49188
Symptoms: Cable metering fails and enters a “hung” state.
Conditions: This occurs when the ip tcp timestamp command is configured globally on the Cisco
uBR7200 router.
Workaround: Do not use the ip tcp timestamp command in global configuration mode.
•
CSCsw35917
Symptoms: SP syslog messages are logged on the RP console but are not sent as SNMP trap
messages by the route processor’s (RP) SNMP agent.
Conditions: This issue occurs on routers running Cisco IOS Release 12.2(18)SXF.
Workaround: There is no workaround.
•
CSCsw52539
Symptoms: Cable metering collection enters the “write-error” state and does not recover.
Conditions: This issue occurs when cable metering is configured with the default TCP parameters.
Workaround: Enabling the ip tcp path-mtu-discovery command may help prevent occurrences of
the issue; Running the test cable metering abort command clears the “hung” state and allows the
next iteration of cable metering to occur.
•
CSCsw79768
Symptoms: SNMP GetNext requests for docsQosServiceFlowPrimary (also known as
1.3.6.1.2.1.10.127.7.1.3.1.8 or docsQosServiceFlowEntry.8) are rejected. However, if a certain
docsQosServiceFlowPrimary entry is polled with SNMP GetNext directly (after some additional
calculations are performed to determine the index value), the value is returned as expected.
Conditions: This issue occurs in Cisco uBR7114E routers running Cisco IOS Release
12.3(21a)BC3.
Workaround: Poll the individual values following the steps of the procedure suggested in SR
610144513.
•
CSCsx20894
Symptoms: The Cisco uBR7246VXR router incorrectly reports docsIfDocsisBaseCapability of “4”
that is, the DOCSIS 3.0 support.
Conditions: This issue occurs in Cisco uBR7246VXR routers running the Cisco IOS
release12.2(33)SCB.
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Workaround: There is no workaround.
•
CSCsx38826
Symptoms: The DOCSIS 2.0-compliant cable modems are stuck in reject (NA) state on the cable
modem termination system (CMTS) running Cisco IOS Release 12.2(33)SCB.
Conditions: This issue is seen in modems that register using service class names instead of service
flow definitions.
Workaround: Do not use service class names during modem configuration; Check if the modem
firmware ignores the unknown service flow Type Length Values (TLV), instead of rejecting it.
Workaround: Use shut/no shutdown command.
Resolved Caveats—Cisco IOS Release12.2(33)SCB2
•
CSCso90058
Symptoms: The Multilayer Switch Feature Card (MSFC) crashes with RedZone memory corruption.
Conditions: This issue occurs when an auto-RP packet is being processed and Network Address
Translation (NAT) is enabled.
Workaround: There is no workaround.
•
CSCsv90106
Symptoms: A router may write a crashinfo that lacks the normal command logs, crash traceback,
crash context, or memory dumps.
Conditions: This issue may be seen in a memory corruption crash depending on precisely how the
memory was corrupted.
Workaround: There is no workaround.
Open Caveats—Cisco IOS Release 12.2(33)SCB1
•
CSCeh33888
Symptoms: A Cisco uBR7246VXR router may reload with the last reset from watchdog reset.
Conditions: The router has a Cisco uBR7200-NPE-G1 processor board and is running Cisco IOS
release 12.3(9a)BC.
Workaround: There is no workaround.
•
CSCsi43840
Symptoms: The Cisco uBR7246VXR-MC28U line card resets with no crash file being generated in
bootflash.
Conditions: The problem may occur on some Cisco uBR7246VXR router with multiple MC28U
cards.
Workaround: There is no workaround.
•
CSCsu00342
Symptoms: A drop in multicast streams is seen after changing the IGMP query interval, using the
ip igmp query-interval command.
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Conditions: This issue occurs in Cisco 7600 chassis with Sup720 engine running Cisco IOS release
12.2(33)SRB. The Cisco 7600 is configured with IGMPV3 and running Source Specific Multicast
(SSM).The multicast stream(s) restore itself within 40-60 seconds.
Workaround: There is no workaround.
•
CSCsu18117
Symptoms: ToS value on multicast packets are being incorrectly overwritten.
Conditions: This issue occurs in routers using Cisco IOS release 12.2(33)SCB.
Workaround: There is no workaround.
•
CSCsv16701
Symptoms: Power supply is not displayed in the output of show inventory command on Cisco
uBR7246 VXR platform.
Conditions: This issue occurs on Cisco uBR7246VXR routers.
Workaround: Use the show environment command to see the power supply.
•
CSCsv82736
Symptoms: Modem cannot come online on the upstream. This issue was first detected in
Cisco IOS Release 12.3(21a)BC6. The modem reaches the init(r1) or init(r2) but, fails to proceed
further.
Conditions: The issue appeared at customer site in Cisco IOS release 12.3(21a)BC6. It is a a very
rare condition.
Workaround: Use shut/no shutdown command.
•
CSCsw14622
Symptoms: The last character in the Service Class Name field is dropped in Subscriber Account
Management Interface Specification (SAMIS) records as well as in the SNMP MIB
docsQosServiceFlowLogServiceClassName.
Conditions: This occurs fro deleted service flows.
Workaround: There is no workaround.
•
CSCsw35917
Symptoms: SP syslog messages are logged on the RP console but are not sent as SNMP trap
messages by route processor’s (RP) SNMP agent.
Conditions: This issue occurs in routers running Cisco IOS release 12.2(18)SXF.
Workaround: There is no workaround.
•
CSCsw37209
Symptoms: Source verification of IPV6 packets does not happen, although the cable ipv6
source-verify command is configured on cable interface of a Cisco uBR7200 router.
Conditions: This issue occurs when Cisco IOS 12.2S release is running on a Cisco uBR7200 router.
Workaround: There is no workaround.
•
CSCsw49188
Symptoms: Cable metering fails and enters a “hung” state.
Conditions: This occurs when the ip tcp timestamp command is configured globally.
Workaround: Do not use the ip tcp timestamp command.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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Caveat List for Cisco IOS Release 12.2(33)SCB
•
CSCsw52539
Symptoms: Cable metering collection enters the “write-error” state and does not recover.
Conditions: This issue occurs when cable metering is configured with default TCP parameters.
Workaround: Enabling the ip tcp path-mtu-discovery command may help prevent occurrences of
the issue; Running the test cable metering abort command clears the “hung” state and allows the
next iteration of cable metering to occur.
•
CSCsw79768
Symptoms: SNMP GetNext requests for docsQosServiceFlowPrimary (also known as
1.3.6.1.2.1.10.127.7.1.3.1.8 or docsQosServiceFlowEntry.8) are rejected. And, if a certain
docsQosServiceFlowPrimary entry is polled with SNMP Get directly (after some additional
calculations are performed to determine the index value), the value is returned as expected.
Conditions: This issue occurs in Cisco uBR7114E routers running Cisco IOS release 12.3(21a)BC3.
Workaround: Poll the individual values following the steps of the procedure suggested in SR
610144513.
•
CSCsx20894
Symptoms: Cisco uBR7246VXR router incorrectly reports docsIfDocsisBaseCapability of “4”,that
is the DOCSIS 3.0 support.
Conditions: This issue occurs in Cisco uBR7246VXR routers running the Cisco IOS
release12.2(33)SCB.
Workaround: There is no workaround.
Resolved Caveats—Cisco IOS Release 12.2(33)SCB1
•
CSCsv04836
Multiple Cisco products are affected by denial of service (DoS) vulnerabilities that manipulate the
state of Transmission Control Protocol (TCP) connections. By manipulating the state of a TCP
connection, an attacker could force the TCP connection to remain in a long-lived state, possibly
indefinitely. If enough TCP connections are forced into a long-lived or indefinite state, resources on
a system under attack may be consumed, preventing new TCP connections from being accepted. In
some cases, a system reboot may be necessary to recover normal system operation. To exploit these
vulnerabilities, an attacker must be able to complete a TCP three-way handshake with a vulnerable
system.
In addition to these vulnerabilities, Cisco Nexus 5000 devices contain a TCP DoS vulnerability that
may result in a system crash. This additional vulnerability was found as a result of testing the TCP
state manipulation vulnerabilities.
Cisco has released free software updates for download from the Cisco website that address these
vulnerabilities. Workarounds that mitigate these vulnerabilities are available.
This advisory is posted at
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20090908-tcp24.
•
CSCsv38166
The server side of the Secure Copy (SCP) implementation in Cisco IOS software contains a
vulnerability that could allow authenticated users with an attached command-line interface (CLI)
view to transfer files to and from a Cisco IOS device that is configured to be an SCP server,
regardless of what users are authorized to do, per the CLI view configuration. This vulnerability
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Caveat List for Cisco IOS Release 12.2(33)SCB
could allow valid users to retrieve or write to any file on the device's file system, including the
device's saved configuration and Cisco IOS image files, even if the CLI view attached to the user
does not allow it. This configuration file may include passwords or other sensitive information.
The Cisco IOS SCP server is an optional service that is disabled by default. CLI views are a
fundamental component of the Cisco IOS Role-Based CLI Access feature, which is also disabled by
default. Devices that are not specifically configured to enable the Cisco IOS SCP server, or that are
configured to use it but do not use role-based CLI access, are not affected by this vulnerability.
This vulnerability does not apply to the Cisco IOS SCP client feature.
Cisco has released free software updates that address this vulnerability.
Workaround: There are no workarounds available for this vulnerability apart from disabling either
the SCP server or the CLI view feature if these services are not required by administrators.
This advisory is posted at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20090325-scp.
•
CSCsr29468
Cisco IOS software contains a vulnerability in multiple features that could allow an attacker to cause
a denial of service (DoS) condition on the affected device. A sequence of specially crafted TCP
packets can cause the vulnerable device to reload.
Cisco has released free software updates that address this vulnerability.
Several mitigation strategies are outlined in the workarounds section of this advisory.
This advisory is posted at
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20090325-tcp
•
CSCsj19540
Symptoms: Ping request to a /31 loopback interface in VRF fails.
Conditions: This issue occurs when the loopback has a /31 address configured in a VRF.
Workaround: There is no workaround.
•
CSCso55151
Symptoms: A memory leak is observed on the router for ARP packets.
Conditions: This issue occurs on routers with CEF switching.
Workaround: There is no workaround.
•
CSCsr72301
Symptoms: Three separate Cisco IOS Hypertext Transfer Protocol (HTTP) cross-site scripting
(XSS) vulnerabilities and a cross-site request forgery (CSRF) vulnerability have been reported to
Cisco by three independent researchers.
Conditions: The Cisco Security Response is posted at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityResponse/cisco-sr-20090114-http
See “Additional Information” section in the posted response for further details.
Workaround: See “Workaround” section in the posted response for further details.
•
CSCsv11927
Symptoms: The Cisco uBR7200 router might hang when an unknown MAC address is used while
running the cable monitor command.
Conditions: This occurs when an unknown MAC address (not present in the CMTS database) is used
while executing the cable monitor command.
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Workaround: Use a known MAC address.
•
CSCsv42988
Symptoms: When the routers are booted sequentially, by bringing up the standby router after the
active router is booted up, the routers fall into route processor redundancy (RPR) mode instead of
stateful switchover (SSO) mode.
Conditions: This issue occurs in network analysis module (NAM) running Cisco IOS SRC2 image.
Workaround: There is no workaround.
•
CSCsv58913
Symptoms: Address resolution fails for downstream packet when running cable source-verify dhcp
command.
Conditions: This issue occurs when a Cisco uBR Series router configured to verify a CPE device’s
IP address to MAC address resolution, through the use of DHCP LEASEQUERY messages instead
of using ARP.
Workaround: Temporarily allow downstream ARP resolution using cable bundle interface
commands cable arp and cable proxy-arp.
•
CSCsv73509
Symptoms: User authentication is possible through a local server, although Terminal Access
Controller Access Control System (TACACS) is configured.
Conditions: This issue occurs for the exec users under vty configuration.
Workaround: There is no workaround.
•
CSCsw48328
Symptoms: Service type ID-based cable modem redirection may not work.
Conditions: This issue occurs in routers running Cisco IOS release 12.2(33)SCB1.
Workaround: There is no workaround.
•
CSCsx38826
Symptoms: DOCSIS 2.0-compliant cable modems are stuck in reject(na) state on a CMTS running
Cisco IOS release 12.2(33)SCB.
Conditions: This issue is seen in modems that register using service class names instead of service
flow definitions.
Workaround: Do not use service class names during modem configuration or else check if the
modem firmware ignores the unknown service flow Type Length Values (TLV), instead of being
rejected.
•
CSCsx43002
Symptoms: The output of show tech-support command contains snmp community string
passwords.
Conditions: This issue occurs in the output of the show tech-support command.
Workaround: These passwords must be removed. Replace the show tech-support snmp community
string show cable modem remote-query 30 mypassword and with show cable modem
remote-query 30.
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•
Caveat List for Cisco IOS Release 12.2(33)SCB
CSCsx51619
Symptoms: The MAC destination address based classifier acts like a default catch-all classifier on
the Cisco uBR 7200 router. This issue occurs when this classifier is checked (after the ones with
higher rule priority), thus causing it to match all the packets.
Conditions: This problem exists since Cisco IOS Release 12.3(23)BC6 release on uBR7225 router
and uBR7100 platforms.
Workaround: There is no workaround except avoiding using the MAC classifier on Cisco uBR7200
router.
If a MAC destination address based classifier is configured, the classifiers with lower rule priority
and the default classifier will not see any matches.
•
CSCsy13636
Symptoms: A silent reload occurred on the Cisco uBR-MC28X line card and no crash information
was written on the boot flash.
Conditions: This issue occurred on the Cisco uBR-MC28X line card.
Workaround: Remove the load balancing configuration on the affected line card.
Open Caveats —Cisco IOS Release 12.2(33)SCB
•
CSCsv82736
Symptoms: Modem cannot come online on the upstream. This issue was first detected in
Cisco IOS Release 12.3(21a)BC6. The modem reaches the init(r1) or init(r2) but, fails to proceed
further.
Conditions: The issue appeared at customer site in Cisco IOS release 12.3(21a)BC6. It is a a very
rare condition.
Workaround: Use shut/no shutdown command.
•
CSCsv11927
Symptoms: When using the cable monitor command and inserting as an argument an unknown
MAC address (not in CMTS database) the ubr7200 might hang.
Conditions: Using the cable monitor command with a mac address not known in the CMTS
database.
Workaround: Use the correct mac address.
•
CSCeh33888
Symptoms: A Cisco uBR7246VXR may reload with Last reset from watchdog reset.
Conditions: The router has a UBR7200-NPE-G1 processor board and is running IOS version
12.3(9a)BC.
Workaround: None.
•
CSCsi43840
Symptoms: The Cisco uBR7246vxr-MC28U Card resets with no crash file being generated in
bootflash.
Conditions:
The problem may happen on some Cisco uBR7246vxr with multiple MC28U cards.
Workaround: There is no workaround.
Cisco uBR7200 Router Release Notes for Cisco IOS Release 12.2(33)SCH
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