Release Notes for Cisco IOS Release
12.2(33)SCA for Cisco uBR10012 Routers
June 20, 2011
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Text Part Number: OL-25293-01
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Release Notes for Cisco IOS Release 12.2(33)SCA for Cisco uBR10012 Routers
© 2011 Cisco Systems, Inc. All rights reserved.
CONTENTS
iii
CHAPTER
1
Introduction
1-1
Inheritance Information
1-1
System Requirements 1-2
Memory Requirements 1-2
Hardware Supported 1-2
Cable Interface Line Cards Supported 1-2
Cisco uBR10012 Universal Broadband Router Line Cards Supported 1-4
Other Hardware Supported 1-5
Verifying the Software Version 1-5
Upgrading to a New Software Release 1-5
Upgrading to Cisco IOS Release 12.2(33)SCA on a Cisco uBR10012 Universal Broadband
Router 1-6
Upgrading from ESR-PRE1 to ESR-PRE2 Processors 1-6
Upgrading from Cisco IOS Release 12.3BC or Earlier Cisco IOS Software Release 1-6
Rollback Procedure 1-7
Microcode Software 1-8
SPA FPD Image Packages for the Cisco uBR10012 1-8
Upgrading from Cisco IOS Release 12.3BC or Earlier Cisco IOS Software Release 1-8
Feature Support 1-8
Cisco CMTS User Documentation References for Cisco IOS Release 12.2SC 1-9
Cisco Feature Navigator 1-10
New and Changed Information 1-11
New Hardware Features in Cisco IOS Release 12.2(33)SCA2 1-12
New Hardware Features in Cisco IOS Release 12.2(33)SCA1 1-12
New Hardware Features in Cisco IOS Release 12.2(33)SCA 1-12
Cisco uBR10012 Support in Cisco IOS Release 12.2(33)SCA 1-12
Cisco Wideband SIP and Cisco Wideband SPA 1-13
New Software Features in Cisco IOS Release 12.2(33)SCA2 1-14
Modified Software Features in Cisco IOS Release 12.2(33)SCA2 1-14
New Software Features in Cisco IOS Release 12.2(33)SCA1 1-14
Modified Software Features in Cisco IOS Release 12.2(33)SCA1 1-14
New Software Features in Cisco IOS Release 12.2(33)SCA 1-14
Release Notes for Cisco IOS Release 12.2(33)SCA for Cisco uBR10012 Routers
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iii
Contents
DHCPv6 Relay Agent Notification for Prefix Delegation 1-14
IPv6 on Cable 1-15
L2VPN Support over Cable 1-15
MPLS HA 1-16
Multicast VPN and DOCSIS 3.0 Multicast QoS support 1-16
NSF/SSO 1-17
Service Independent Intercept on the Cisco CMTS 1-19
MIBs 1-19
New and Changed MIB Information in Cisco IOS Release 12.2(33)SCA
1-19
Limitations and Restrictions 1-20
Unsupported Hardware 1-20
Software Feature Restrictions 1-20
DOCSIS 1-20
DTI Card Configuration 1-20
MIBs Restrictions 1-21
PacketCable 1-21
PCMCIA 1-21
PXF 1-21
Redundancy 1-21
Wideband 1-22
Important Notes
1-22
Obtaining Documentation and Submitting a Service Request
CHAPTER
2
1-23
Caveat List for Cisco IOS Release 12.2(33)SCA 2-1
Cisco Bug Search 2-1
Open Caveats — Cisco IOS Release 12.2(33)SCA2 2-1
Resolved Caveats — Cisco IOS Release 12.2(33)SCA2 2-5
Open Caveats — Cisco IOS Release 12.2(33)SCA1 2-17
CMTS-Application 2-17
CMTS-Management 2-18
CMTS-Platform 2-18
CMTS-Redundancy 2-18
CMTS-Wideband 2-20
Resolved Caveats — Cisco IOS Release 12.2(33)SCA1 2-21
CMTS-Application 2-21
CMTS-DOCSIS 2-23
CMTS-Drivers 2-23
CMTS-Management 2-24
CMTS-Packetcable 2-24
Release Notes for Cisco IOS Release 12.2(33)SCA for Cisco uBR10012 Routers
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CMTS-Platform 2-24
CMTS-PXF 2-25
CMTS-Redundancy 2-25
CMTS-Wideband 2-26
IPv6 2-26
Operating System 2-27
PXF-Common 2-27
vpdn 2-27
Open Caveats — Cisco IOS Release 12.2(33)SCA 2-27
CMTS-Application 2-27
CMTS-Management 2-27
CMTS-PXF 2-28
CMTS-Redundancy 2-28
CMTS-Wideband 2-28
Miscellaneous 2-29
IP Multicast 2-29
Resolved Caveats — Cisco IOS Release 12.2(33)SCA 2-29
Release Notes for Cisco IOS Release 12.2(33)SCA for Cisco uBR10012 Routers
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Release Notes for Cisco IOS Release 12.2(33)SCA for Cisco uBR10012 Routers
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CH A P T E R
1
Introduction
This document contains information about downloading and installing Cisco IOS Release 12.2(33)SCA.
It also provides new and changed information, hardware support, limitations and restrictions, and
caveats for Cisco IOS Release 12.2(33)SCA.
For software caveats that apply to the Cisco IOS Release 12.2(33)SCA on the Cisco uBR7200 series
routers, see the corresponding release notes for Cisco uBR7200 Series 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 1-11
•
MIBs, page 1-18
•
Limitations and Restrictions, page 1-19
•
Important Notes, page 1-21
•
Obtaining Documentation and Submitting a Service Request, page 1-22
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 uBR10012 Router Release Notes for Cisco IOS Release 12.2(33)SCA
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Chapter 1
Introduction
System Requirements
System Requirements
These sections describe the system requirements for Cisco IOS Release 12.2(33)SCA:
•
Memory Requirements, page 1-2
•
Hardware Supported, page 1-2
•
Verifying the Software Version, page 1-5
•
Upgrading to a New Software Release, page 1-5
•
Microcode Software, page 1-8
•
Feature Support, page 1-8
Memory Requirements
This section describes the memory requirements for Cisco IOS Release 12.2(33)SCA.
Table 1-1 displays the memory recommendations for the Cisco uBR10012 universal broadband router
with Cisco IOS Release 12.2(33)SCA feature sets.
Table 1-1
Memory Recommendations for the Cisco uBR10012 Router
Feature Set
DOCSIS Base 3 DES image and
Lawful Intercept for Cisco PRE22
Cisco uBR10012
Route Processor Software Image
Recommended
Flash Memory
Recommended
DRAM Memory1
Runs
From
PRE2
128 MB
1.0 GB
RAM
ubr10k2-k9p6u2-mz
1. DRAM memory is not configurable on the Cisco uBR10012 router.
2. PRE = Performance Routing Engine
Hardware Supported
The following sections list the hardware supported on various Cisco IOS Releases:
•
Cable Interface Line Cards Supported, page 1-2
•
Microcode Software, page 1-8
•
Other Hardware Supported, page 1-5
Cable Interface Line Cards Supported
Table 1-2 provides information about the cable interface line cards supported in
Cisco IOS Release 12.2(33)SCA.
Table 1-2
Cable Interface Line Cards Supported in Cisco IOS Release 12.2(33)SCA
Supported Cable Interface Line Card
Minimum Cisco IOS Release Required Processor Engine
Cisco uBR10-MC5X20S/U/H—maximum 8
Cisco IOS Release 12.2SCA
PRE2
Cisco uBR10012 Router Release Notes for Cisco IOS Release 12.2(33)SCA
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System Requirements
OIR of Cable Interface Line Cards on the Cisco uBR10012 Universal Broadband Router
The Cisco uBR10012 series universal broadband routers support online insertion and removal (OIR) of
cable interface line cards only when exchanging cable interface line cards of the same type.
Prerequisites for Performing OIR
•
Save the line card configuration before starting the OIR.
•
Perform OIR when the CMTS is up and running.
•
Change the standby card (if available) to HOT state.
•
Save the startup configuration file before any reload of the system (if there is a need to reload), after
a successful OIR.
Restrictions During OIR Process
•
OIR upgrade cannot be performed when the standby PRE is being loaded.
•
OIR downgrade from the Cisco UBR-MC20X20V line card to the Cisco uBR10-MC5X20 line card
may fail in certain scenarios when the frequency and RF power settings on the
Cisco UBR-MC20X20V line card are incompatible with the Cisco uBR10-MC5X20 card.
Performing an OIR of a Cable Interface Line Card
Step 1
In global configuration mode, enter the cr10k card oir-compatibility command for the cable interface
line card to perform an OIR, as shown in the following example:
Router(config)# cr10k card 8/0 oir-compatibility
This command helps preserve the configuration and performs some internal synchronization to make
sure that the OIR runs successfully.
Step 2
Save the configuration to ensure the transition, as shown in the following example:
Router# copy running-config startup-config
Step 3
Turn the power off to the line card using the cable power off command for the slot that is being replaced,
as shown in the following example:
Router# cable power off 8/0
Line Card 8/0 is POWERED OFF
This powers off the line card gracefully.
Step 4
Before removing the card, verify that the proper grounding instructions have been followed for the card.
For more information about preventing electrostatic discharge (ESD) damage, see:
http://www.cisco.com/warp/public/109/cable-linecard-handling.pdf
Step 5
Remove the line card.
Step 6
Replace it with the new line card in the slot.
Step 7
Enter the cable power on command to power up the line card, as shown in the following example:
Router# cable power on 8/0
Step 8
Enter the show interface cable command and verify that the card and line protocol is “up” as shown in
the following example:
Router# show interface cable 8/0/0
Cable8/0/0 is up, line protocol is up
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Hardware is BCM3210 ASIC, address is 000a.13e8.1ca8 (bia 000a.13e8.1a60)
Internet address is 10.1.1.3/24
MTU 1500 bytes, BW 27000 Kbit, DLY 1000 usec, rely 255/255, load 1/255
Encapsulation, loopback not set, keepalive not set
ARP type: ARPA, ARP Timeout 04:00:00
Last input 4d07h, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Queuing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 1834000 bits/sec, 2385 packets/sec
5 minute output rate 1982000 bits/sec, 2431 packets/sec
24461542 packets input, 2348214388 bytes, 0 no buffer
Received 1979 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
24854257 packets output, 2536222931 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
Step 9
Enter the show controllers cable command and verify the hardware status, as shown in the following
example:
Router# show controllers cable 8/0/0
Cable8/0/0 JIB hardware status:
JIB Downstream port
Enabled
JIB Upstream
port 0 Enabled
JIB Upstream
port 1 Enabled
JIB Upstream
port 2 Enabled
JIB Upstream
port 3 Enabled
Cable8/0/0 Upconverter is Enabled Output is Enabled
Model: 74-3153-02 Serial Number: 0WAV090200A1 CLEI Code: FFFFFFFFFF
HW Rev:
PC2D0109 SW Rev: 203, NVRAM Rev: 021 ECI numb
Note
Step 10
To verify the hardware status of the Cisco UBRMC20X20V cable line cards, it is recommended
that you run the show controller integrated-cable 8/0/0 brief command instead of the show
controllers cable command.
Verify the configuration with the show running-configuration command.
Cisco uBR10012 Universal Broadband Router Line Cards Supported
The Cisco uBR10012 universal broadband router supports up to four network line cards with any
combination of the following cards:
•
Cisco Half-Height Gigabit Ethernet (HHGE) line card
•
Cisco uBR10012 OC-48 DPT/POS interface module
Cisco uBR10012 Router Release Notes for Cisco IOS Release 12.2(33)SCA
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Other Hardware Supported
Table 1-3 provides information about other hardware supported in Cisco IOS Release 12.2(33)SCA.
Table 1-3
Other Hardware Supported in this Cisco IOS Release
Cisco uBR10012
Router
Minimum Cisco IOS Release
Hardware
Cisco Wideband SIP and Cisco Wideband
SPA
Yes
Cisco IOS Release 12.2(33)SCA
Cisco uBR10012 universal broadband router Yes
TCC+ card
Cisco IOS Release 12.2(33)SCA
Verifying the Software Version
To determine 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, 10000 Software (UBR10K4-K9P6U2-M), Version 12.2(33)SCA
EXPERIMENTAL IMAGE ENGINEERING C10K_WEEKLY BUILD, synced to
MAYFLOWER_BASE_FOR_V122_33_SA_THROTTLE
Copyright (c) 1986-2008 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.shtml
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:
http://www.cisco.com/warp/public/cc/pd/iosw/prodlit/957_pp.htm
To choose a new Cisco IOS software release based on information about defects that affect that software,
use Bug Toolkit at the following URL:
http://tools.cisco.com/Support/BugToolKit/action.do?hdnAction=searchBugs
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System Requirements
Upgrading to Cisco IOS Release 12.2(33)SCA on a Cisco uBR10012 Universal Broadband Router
A cold start of the router is recommended for an upgrade to Cisco IOS Release 12.2(33)SCA on a Cisco
uBR10012 universal broadband router from a different release train, such as Cisco IOS
Release 12.3(23)BC or other BC releases.
If you are supporting PRE1 or earlier processors, it is also required to upgrade to PRE2 processors to
support Cisco IOS Release 12.2(33)SCA.
Upgrading from ESR-PRE1 to ESR-PRE2 Processors
Upgrading a system that currently uses an ESR-PRE1 (or earlier processor) requires a hardware upgrade
to an ESR-PRE2 to run Cisco IOS Release 12.2(33)SCA. For hardware installation instructions, see the
Cisco Performance Routing Engine (ESR-PRE2) Upgrade Installation document at the following URL:
http://www.cisco.com/en/US/docs/interfaces_modules/cable/performance_routing_engine/quick/start/p
re2_qsg.html
Upgrading from Cisco IOS Release 12.3BC or Earlier Cisco IOS Software Release
To upgrade from Cisco IOS Release12.3BC or earlier Cisco IOS software release, perform the following
steps for an ESR-PRE2 cold start.
This procedure assumes the following configuration:
Note
•
Cisco uBR10012 chassis with two installed ESR-PRE2 processors
•
A non-upgrade-enabled image such as Cisco IOS Release 12.3BC or earlier on the PRE2s
The router will not be available for user traffic during Step 7 of the software upgrade, and traffic cannot
resume until the upgrade is complete.
To identify the key differences in the Cisco IOS Release SC train, see Important Notes, page 1-21
To perform the upgrade, follow these steps:
Step 1
Load the appropriate Cisco IOS Release 12.2SC image from the TFTP server into bootflash on both
ESR-PRE2s.
Step 2
If the startup configuration is not up to date, save the running configuration using the write-memory
command.
Step 3
Copy the startup configuration from the active ESR-PRE2 to a disk or TFTP server to save it for possible
rollback.
Step 4
At the console, use the boot system bootflash:image_name command to edit your boot system variable
to point to the Cisco IOS Release12.2SC image in bootflash. Save the running configuration using the
write memory command.
Use the show bootvar command to verify that the boot system variable has been altered appropriately
on both the active and standby ESR-PRE2s.
If you do not want to make further changes to the startup configuration for the new command set offered
by Cisco IOS Release 12.2SC, skip to Step 7.
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Note
In some older releases, the configuration does not explicitly specify the redundancy mode. If your
current configuration is one of these, and you want RPR+ operation with Cisco IOS release 12.2SC, you
must add the line mode rpr-plus after the line that specifies redundancy in the configuration on the
TFTP server. Cisco IOS Release 12.2SC defaults to SSO mode unless it is explicitly configured for
RPR+.
Step 5
Your startup configuration now reflects the altered boot system image. Copy it to the TFTP server and
make any other needed edits. Then copy the altered configuration from the server to the startup
configuration on the active and standby ESR-PRE2s using the copy tftp startup and copy tftp
stby-nvram:startup-config commands. Verify that the startup configuration has been copied to both the
active and the standby NVRAM using the dir command and comparing file size.
Step 6
Verify again that the boot image and config-register are set appropriately using the show bootvar
command.
Step 7
On the active ESR-PRE2, enter the reload command and type no if you are asked to save the running
configuration.
•
If the system is configured for autoboot, it will autoboot the new 12.2SC image on both ESR-PRE2s.
•
If the system is not configured for autoboot, both ESR-PRE2s will come up in ROM monitor after
reloading. Boot the 12.2SC image in bootflash from the ROM monitor prompt on each ESR-PRE2.
At this point, the system should be operating as a dual-PRE redundant Cisco IOS Release 12.2(28)SB
system in the configured mode (either SSO or RPR+), running the properly modified startup
configuration. You can verify the redundancy status using the show redundancy or show redundancy
state command.
Step 8
Enter the write memory command from the active console to bring the startup configuration up to date
on the active and standby ESR-PRE2s.
Rollback Procedure
To roll back to the original release:
Step 1
Copy the original startup configuration from the TFTP server to the startup configuration on the active
and standby ESR-PRE2s using the copy tftp startup and copy tftp stby-nvram:startup-config
commands. (This is the configuration file you copied in Step 3 of the upgrade procedure.)
Step 2
Use the show bootvar command to verify that the boot system variable now points to the old image and
the config-register is set appropriately.
Step 3
Reload the active ESR-PRE2 using the reload command.
•
If autoboot is set, the system should come up in the configured redundant mode (for older releases
that support redundancy).
•
If autoboot is not set, the system will come up to ROM monitor. From the ROM monitor prompt,
boot the proper image from the bootflash on each ESR-PRE2.
You have now reverted to the original system configuration.
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System Requirements
Microcode Software
This section describes microcode software that is supported for the Cisco uBR10012 router.
SPA FPD Image Packages for the Cisco uBR10012
The field-programmable device (FPD) image packages are used to update the shared port adapter (SPA)
FPD images. If a discrepancy exists between a SPA FPD image and the Cisco IOS image that is running
on the router, the SPA is deactivated until this discrepancy is resolved.
Note
The maximum time to upgrade the FPD image on one SPA is 2 minutes. The total FPD upgrade time
depends on the number of SPAs.
Note
The FPD image package that is used to upgrade SPAs on a router that runs
Cisco IOS Release 12.2(33)SCA is the ubr10k-fpd-pkg.122-33.SCA pkg file.
Table 4
Shared Port Adapter FPD Image Package Contents
Supported SPAs
FPD ID
FPD Component
Name
FPD Component
Version
Minimum Required
Hardware Version
Cisco Wideband SPA
1
BLAZE FPGA
1285.1446
0.0
Upgrading from Cisco IOS Release 12.3BC or Earlier Cisco IOS Software Release
For more information, see the Cisco uBR10012 Router Release Notes for
Cisco IOS Release 12.2(33)SCA at the following URL:
http://www.cisco.com/en/US/products/hw/cable/ps2209/prod_release_notes_list.html
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].
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Cisco CMTS User Documentation References for Cisco IOS Release 12.2SC
Table 1-5 provides information about the important user guides in Cisco IOS Release 12.2SC.
Table 1-5
Important Guides 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/c/en/us/td/docs/cable/cmts/ubr10012/roadmap/u10krdmp.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/c/en/us/td/docs/cable/cmts/cmd_ref/b_cmts_cable_cmd_ref.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/c/en/us/support/video/ubr10000-series-universal-broadband-rout
ers/products-implementation-design-guides-list.html
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/c/en/us/support/video/ubr10000-series-universal-broadband-rout
ers/products-installation-guides-list.html
Configuration Guides
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 set:
http://www.cisco.com/c/en/us/support/video/ubr10000-series-universal-broadband-rout
ers/products-installation-and-configuration-guides-list.html
Error and System Messages
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/c/en/us/support/video/ubr10000-series-universal-broadband-rout
ers/products-system-message-guides-list.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/c/en/us/support/video/ubr10000-series-universal-broadband-rout
ers/products-troubleshooting-guides-list.html
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System Requirements
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
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.
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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 uBR10012 universal broadband routers in Cisco IOS Release 12.2(33)SCA and its
maintenance-based releases:
•
New Hardware Features in Cisco IOS Release 12.2(33)SCA2, page 1-11
•
New Hardware Features in Cisco IOS Release 12.2(33)SCA1, page 1-11
•
New Hardware Features in Cisco IOS Release 12.2(33)SCA, page 1-11
•
New Software Features in Cisco IOS Release 12.2(33)SCA2, page 1-13
•
Modified Software Features in Cisco IOS Release 12.2(33)SCA2, page 1-13
•
New Software Features in Cisco IOS Release 12.2(33)SCA1, page 1-13
•
Modified Software Features in Cisco IOS Release 12.2(33)SCA1, page 1-13
•
New Software Features in Cisco IOS Release 12.2(33)SCA, page 1-13
New Hardware Features in Cisco IOS Release 12.2(33)SCA2
There are no new hardware features in Cisco IOS Release 12.2(33)SCA2.
New Hardware Features in Cisco IOS Release 12.2(33)SCA1
There are no new hardware features in Cisco IOS Release 12.2(33)SCA1.
New Hardware Features in Cisco IOS Release 12.2(33)SCA
This section describes the hardware features supported in Cisco IOS 12.2(33)SCA. Some features may
be new to Cisco IOS Release 12.2(33)SCA but were released in earlier Cisco IOS software releases.
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Cisco uBR10012 Support in Cisco IOS Release 12.2(33)SCA
This feature adds support for the Cisco uBR10012 universal broadband router in Cisco IOS Release
12.2(33)SCA. The Cisco uBR10012 router is previously supported in Cisco IOS Release 12.3BC.
The Cisco uBR10012 router provides a cost-effective, scalable, and industry-proven CMTS, optimized
for aggregating traffic at the edge of the cable network. It has eight broadband aggregation slots and four
WAN backhaul slots.
Designed for cable operators and service providers, the Cisco uBR10012 router CMTS platform
connects residential subscribers via cable modems, digital set-top boxes, or IP telephony cable modems
for high-speed data, broadband entertainment, and IP telephony solutions.
The Cisco uBR10012 router chassis is designed for front and rear access. The front of the chassis
provides access to the following components:
•
Two performance routing engine processor modules
•
LCD display
•
Two DC Power Entry Modules (DC PEMs)
•
Fan assembly module
The rear of the chassis provides access to the following components:
•
Eight cable interface line cards (single-slot)
•
Four high-speed, high-performance network uplink interface line cards
•
Two Timing, Communication, and Control Plus (TCC+) cards
The Cisco uBR10012 router uses redundant PEMs using –48 to –60 VDC input power. An optional
AC-input power shelf can be used to provide the DC-output power for the Cisco uBR10012 router.
For more information on the Cisco uBR10012 router chassis and supported components, see the
“Obtaining Documentation and Submitting a Service Request” section on page 1-22.
Cisco Wideband SIP and Cisco Wideband SPA
The Cisco uBR10012 router currently supports only the Cisco Wideband SIP for the 1-Gbps Wideband
SPA (part number UBR10-2XDS-SIP). The Wideband SIP can support up to two Cisco 1-Gbps
Wideband SPAs.
The Cisco Wideband SPA is a single-wide, half-height shared port adapter that provides Cisco Wideband
Protocol for a DOCSIS Network formatting to the downstream data packets. The Wideband SPA is used
for downstream data traffic only.
The Wideband SPA has one active and one redundant Gigabit Ethernet port that is used to send traffic to
the external edge QAM device. If the link state of both Gigabit Ethernet ports is up, port 0 will come up
as the active port and port 1 will be the redundant port. If the link state of port 0 is not up, port 1 will
come up as the active port.
The Cisco uBR10012 router can support up to two Cisco Wideband SPAs. Depending on how it is
configured, each Cisco Wideband SPA supports up to 24 RF channels. Each Cisco Wideband SPA can
support up to 12 logical wideband channels (bonding groups).
The Wideband SPA contains field-programmable devices: the Wideband SPA FPGAs and Complex
Programmable Logic Device (CPLDs). The FPGA and CPLD upgrade information is part of the Cisco
IOS release rather than a separate file to be downloaded by users.
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For more information about the Cisco Wideband SIP and Cisco Wideband SPA hardware and software,
refer to the following documents for Cisco IOS 12.3(21)BC-based software releases:
•
Cisco uBR10012 Universal Broadband Router SIP and SPA Hardware Installation Guide
•
Cisco uBR10012 Universal Broadband Router SIP and SPA Software Configuration Guide
New Software Features in Cisco IOS Release 12.2(33)SCA2
There are no new software features in Cisco IOS Release 12.2(33)SCA2.
Modified Software Features in Cisco IOS Release 12.2(33)SCA2
There are no modified software features in Cisco IOS Release 12.2(33)SCA2.
New Software Features in Cisco IOS Release 12.2(33)SCA1
There are no new software features in Cisco IOS Release 12.2(33)SCA1.
Modified Software Features in Cisco IOS Release 12.2(33)SCA1
There are no modified software features in Cisco IOS Release 12.2(33)SCA1.
New Software Features in Cisco IOS Release 12.2(33)SCA
This section describes the new cable software features in Cisco IOS Release 12.2(33)SCA. Some
features may be new to Cisco IOS Release 12.2(33)SCA 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)SCA. 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.
DHCPv6 Relay Agent Notification for Prefix Delegation
DHCPv6 relay agent notification for prefix delegation allows the router working as a DHCPv6 relay
agent to find prefix delegation options by reviewing the contents of a DHCPv6 RELAY-REPLY packet
that is being relayed by the relay agent to the client. When a prefix delegation option is found by the
relay agent, the relay agent extracts the information about the prefix being delegated and inserts an IPv6
static route matching the prefix delegation information onto the relay agent. Future packets destined to
that prefix via relay will be forwarded based on the information contained in the prefix delegation. The
IPv6 static route is then left in the routing table until the prefix delegation lease time expires or the relay
agent receives a release packet from the client releasing the prefix delegation.
No user configuration is required for this feature. Static route management is done automatically by the
relay agent.
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The IPv6 routes are added when the relay agent relays a RELAY-REPLY packet, and the IPv6 routes are
deleted when the prefix delegation lease time expires or the relay agent receives a release message. An
IPv6 static route in the routing table of the relay agent can be updated when the prefix delegation lease
time is extended.
This feature leaves a static IPv6 route on the routing table of the relay agent. This registered IPv6 address
allows unicast reverse packet forwarding (uRPF) to work by allowing the router doing the reverse lookup
to confirm that the IPv6 address on the relay agent is not malformed or spoofed. The static route left in
the routing table of the relay agent can be redistributed to other routing protocols to advertise the subnets
to other nodes. The static routes will be removed when an DHCP_DECLINE message is sent by the
client.
For detailed information about this feature, see the “Implementing DHCP for IPv6” chapter of the Cisco
IOS IPv6 Configuration Guide at:
http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-dhcp.html
IPv6 on Cable
In Cisco IOS Release 12.2(33)SCA, IPv6 functionality is introduced on the Cisco universal broadband
routers. IPv6 (Internet Protocol Version 6) has also been called “IPng” (IP Next Generation). Formally,
IPv6 is a set of specifications from the Internet Engineering Task Force (IETF) that were designed as an
evolutionary set of improvements to the current IP Version 4. The most obvious difference between IPv6
and IPv4 is that IP addresses are lengthened from 32 bits to 128 bits, which dramatically increases the
available number of IP addresses as expanding network technologies and the need for IP addressing on
multiple consumer devices is straining the current IPv4 address space.
There are many areas of IPv6 support available in Cisco IOS Release 12.2(33)SCA that are
platform-independent and therefore, are also supported by the Cisco CMTS routers. In addition to these
platform-independent features in the Cisco IOS software, there are DOCSIS 3.0 IPv6 features and legacy
cable features that are modified for support of IPv6.
The IPv6 on Cable feature documentation provides references to the currently documented
platform-independent features in the Cisco IOS software documentation, as well as a list of the
unsupported platform-independent features. Support for new DOCSIS 3.0 IPv6 features and
modifications to legacy cable features are included in this documentation.
For detailed information about this feature, see the Cisco feature document at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_ipv6.html
L2VPN Support over Cable
In Cisco IOS Release 12.2(33)SCA, the Layer 2 VPN (L2VPN) Support over Cable feature on the Cisco
CMTS provides point-to-point Transparent LAN Service (TLS) in support of the Business Services over
DOCSIS (BSOD) CableLabs specification.
The L2VPN Support over Cable feature in Cisco IOS release 12.2(33)SCA differs from prior L2VPN
and TLS support for cable in Cisco IOS release 12.3BC in the following ways:
•
Both features use an Ethernet trunking interface to transport traffic for multiple L2VPN tunnels in
support of different cable modems (CMs) and service flows (SFs) based on IEEE 802.1q VLAN IDs.
For the legacy TLS service, only the primary upstream or downstream SFs are used. With the new
L2VPN Support over Cable feature, both primary and secondary SFs can be used.
•
The TLS feature uses CLI to provision the service. The L2VPN Support over Cable feature uses the
CM configuration file to provision the service, and a single CLI to identify the default Ethernet
Network System Interface (NSI) interface.
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•
Downstream traffic is forwarded on a per-CM basis and upstream traffic is forwarded on a per-SF
basis. For L2VPN Support over Cable, upstream traffic for the same L2VPN can use multiple
upstream service flows and downstream traffic can use different downstream service flows.
For detailed information about this feature, see the Cisco feature document at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_l2vpn.html
MPLS HA
The Multiprotocol Label System (MPLS) high availability (HA) features provide SSO and NSF
capability to the MPLS Label Distribution Protocol (LDP) and MPLS Virtual Private Network (VPN)
features.
The following MPLS HA features have the ability to continue forwarding data following a PRE2
switchover on the Cisco uBR10012 universal broadband router:
•
MPLS Label Distribution Protocol (LDP)
•
MPLS Virtual Private Networks (VPNs)
When you enable MPLS HA, you get the benefit of allowing a PRE2 on the Cisco uBR10012 universal
broadband router to recover from disruption in service without losing its LDP bindings, MPLS
forwarding state, and VPN prefix information.
Restrictions for MPLS HA
•
Any Transport over MPLS (AToM) is not supported.
•
IPv6 over MPLS is not supported.
•
Supports MPLS/HA with the following restrictions for Cisco Express Forwarding (CEF) scalability:
– Up to 1 million prefixes
– Up to 1 million adjacencies
– Up to 1000 Virtual Routing and Forwarding instances (VRFs)
– Arbitrary prefix path counts from the RIB
– 8 paths per prefix for forwarding
For an overview of MPLS HA and more information about these features, refer to the “MPLS High
Availability: Overview” document at:
http://www.cisco.com/en/US/docs/ios/12_2s/feature/guide/fshaov.html
Multicast VPN and DOCSIS 3.0 Multicast QoS support
In Cisco IOS Release 12.2(33)SCA, the Cisco universal broadband routers support the following
multicast features:
•
Encrypted multicast within MVPNs
•
DOCSIS 3.0 multicast QoS and admission control
•
IGMP-only multicast echo
The Multicast VPN (MVPN) feature allows a service provider to configure and support multicast traffic
in a MPLS-VPN environment. This feature supports routing and forwarding of multicast packets for each
individual VPN routing and forwarding (VRF) instance, and it also provides a mechanism to transport
VPN multicast packets across the service provider backbone.
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The MVPN feature allows an Internet service provider (ISP) to provide its MPLS-VPN customers the
ability to transport their Multicast traffic across MPLS packet-based core network. The C-Multicast
packet is encapsulated inside a P-Packet with a configured multicast address, instead of the usual MPLS
tagging. Supported encapsulation methods include a GRE tunnel and IP-IP.
As part of the multicast enhancements introduced in Cisco IOS Release 12.2(33)SCA, the Cisco
universal broadband routers also support DOCSIS 3.0 Multicast QoS. The implementation consists of
group QoS configuration (GQC) in global configuration and association of a particular GQC with a
physical downstream interface in interface configuration mode. The Multicast QOS profile defines the
necessary information for GQC, and the association with a physical interface provides the MAC Domain
and downstream channel set (DCS) information.
In the enhanced multicast echo feature, the Layer 3 multicast switching path uses a parallel express
forwarding (PXF) multicast routing table instead of the existing multicast echo path. Therefore,
upstream packets are echoed using the Layer 3 switching path and all upstream data packets are treated
similarly to the ingress packets from a WAN interface, in which they pass through existing classifiers
and service flows.
Intelligent multicast admission control explicitly acknowledgments of the establishment of each
multicast session, does not consume additional bandwidth for multicast flows once the first flow is
established, and cleans up service flows as the multicast session is torn down.
Restrictions for Multicast VPN and DOCSIS 3.0 Multicast QoS
•
IPv6 is not supported.
For detailed information about this feature, see the Cisco feature document at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/CMTS_enhanced_multicast_ps2209_
TSD_Products_Configuration_Guide_Chapter.html
NSF/SSO
Cisco Nonstop Forwarding (NSF) and Stateful Switchover (SSO) allows for continuous packet
forwarding during a route processor (RP) fail over. This feature adds NSF/SSO support in Cisco IOS
Release 12.2(33)SCA for the Cisco uBR10012 router, specifically for the DOCSIS protocol.
To protect the system from an RP failure, two RPs are used. One RP is the Active RP and the other is the
Standby RP. If the Active RP becomes inactive because of hardware or software failure, the router can
switchover to the Standby RP. SSO maintains the Layer 2 connectivity protocols between devices while
NSF continues to forward IP packets during the route convergence time. The result is a transparent RP
failure; there are no loss sessions or route flaps in the network.
In Cisco IOS Release 12.2(33)SCA, SSO is the default Performance Routing Engine (PRE) redundancy
behavior on the Cisco uBR10012 Universal Broadband Router, with Route Processor Redundancy (RPR)
as the fallback mode. In this release you can change the redundancy mode using the mode redundancy
configuration command.
You can force a PRE switchover using the redundancy force-switchover main-cpu privileged EXEC
command from either the primary or standby PRE. If you force a switchover from the active PRE, the
PREs synchronize and the active PRE reloads normally. When you force a switchover from the standby
PRE, a crash dump of the active PRE occurs by design for troubleshooting purposes. Forcing a
switchover from the standby PRE should only be done if you cannot access the active PRE.
The following new commands or keywords are introduced in this release:
•
debug ehsa
•
debug redundancy idb-sync-history
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New and Changed Information
•
redundancy force-switchover main-cpu
•
show redundancy config-sync failures
•
show redundancy idb-sync-history
•
show redundancy platform
For more information about redundancy features and High Availability on the Cisco CMTS routers, see
the Cisco IOS CMTS Cable Software Configuration Guide at:
http://www.cisco.com/web/techdoc/cable/Config/Sw_conf.html
The following sections provide more information about other NSF/SSO-related features:
MPLS HA
The Multiprotocol Label System (MPLS) high availability (HA) features provide SSO and NSF
capability to the MPLS Label Distribution Protocol (LDP) and MPLS Virtual Private Network (VPN)
features.
The following MPLS HA features have the ability to continue forwarding data following a PRE2
switchover on the Cisco uBR10012 universal broadband router:
•
MPLS Label Distribution Protocol (LDP)
•
MPLS Virtual Private Networks (VPNs)
When you enable MPLS HA, you get the benefit of allowing a PRE2 on the Cisco uBR10012 universal
broadband router to recover from disruption in service without losing its LDP bindings, MPLS
forwarding state, and VPN prefix information.
Restrictions for MPLS HA
•
Any Transport over MPLS (AToM) is not supported.
•
IPv6 over MPLS is not supported.
•
Supports MPLS/HA with the following restrictions for Cisco Express Forwarding (CEF) scalability:
– Up to 1 million prefixes
– Up to 1 million adjacencies
– Up to 1000 Virtual Routing and Forwarding instances (VRFs)
– Arbitrary prefix path counts from the RIB
– 8 paths per prefix for forwarding
For an overview of MPLS HA and more information about these features, refer to the “MPLS High
Availability: Overview” document at:
http://www.cisco.com/en/US/docs/ios/12_2s/feature/guide/fshaov.html
OSPF Graceful Restart
This feature adds support for OSPF Graceful Restart feature in support of RFC 3623 in Cisco IOS
Release 12.2SC. OSPF Graceful Restart support is introduced in Cisco IOS Release 12.3(21)BC.
For more information about the OSPF Graceful Restart feature, refer to the “NSF—OSPF (RFC 3623
OSPF Graceful Restart” document at:
http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/gr_ospf.html
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MIBs
Service Independent Intercept on the Cisco CMTS
In Cisco IOS Release 12.2SC, the Service Independent Intercept (SII) feature enhances the current
Lawful Intercept (LI) capability for Cisco uBR10012 Universal Broadband Routers using SNMPv3.
In other Cisco IOS Releases prior to 12.2SC on the Cable Modem Termination System (CMTS) routers,
LI capability includes the following support:
•
Intercepts for voice traffic in PacketCable environments
•
IP intercepts for SII using SNMPv3
•
Command-line interface (CLI) for MAC intercepts
SII extends this LI capability in Cisco IOS Release 12.2SC by adding support for CPE-based and
CM-based MAC intercepts using SNMPv3.
For detailed information about this feature, see the Cisco feature document at:
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_siiv2.html
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)SCA
The Cisco universal broadband routers include or add support for the following MIBs in
Cisco IOS Release 12.2(33)SCA:
•
CISCO-DOCS-EXT-MIB—Supports object cdxCmtsCmQosProfile to cdxCmtsCmTable to
associate a cable modem with a qos profile
•
CISCO-ENHANCED-MEMPOOL-MIB
•
CISCO-ENTITY-ALARM-MIB—Supports alarm filtering
•
CISCO-IP-FORWARD-MIB
•
CISCO-IP-MIB
•
CISCO-802-TAP-MIB
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•
CISCO-TAP2-MIB
•
CISCO-IP-TAP-MIB
•
CISCO-PROCESS-MIB
•
DOCS-CABLE-DEVICE-MIB
•
DOCS-IF-MIB—Supports draft-ietf-ipcdn-docs-rfmibv2-05.txt
•
DOCSIS-L2VPN-MIB
•
DOCS-SUBMGT-MIB
•
IF-MIB—Supports subinterfaces in the ifTable
•
TCP-MIB
•
UDP-MIB
Limitations and Restrictions
This section describes restrictions for the Cisco universal broadband routers in
Cisco IOS Release 12.2(33)SCF.
Unsupported Hardware
For a list of unsupported hardware, see the End-of-Life and End-of-Sale Notices at:
http://www.cisco.com/en/US/products/hw/cable/ps2209/prod_eol_notices_list.html
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 a US connector to more than one fiber node.
DTI Card Configuration
The Cisco uBR10012 universal broadband router TCC card does not work as expected when the startup
configuration contains the configuration for a Cisco uBR10012 universal broadband router TCC+ card.
To fix this issue, use the no card slot/subslot 2cable-tccplus command and then configure the DTI card.
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MIBs Restrictions
•
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.
PacketCable
Payload Header Suppression (PHS) is not supported on wideband Embedded Media Terminal Adapters
(eMTAs) for dynamic downstream service flows.
PCMCIA
While performing an OIR of the PCMCIA disk on PRE2, the System Event Archive (SEA) application
and other applications such as IPDR write details to the PCMCIA disk on PRE2.
Before performing the OIR, the multiple system operator (MSO) must disable the write access to the
PCMCIA disk on PRE2 using the cable filesystem [enable|disable] command. For more information,
see the CSCsz77977.
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
•
Longer dropout times (about 6 seconds) can occur when you use the OIR method to trigger a cable
line card switchover on the Cisco uBR10012 router. To repair or maintain a cable line card and get
better switchover performance, use the redundancy linecard-group switchover command to
trigger the line card switchover instead.
•
Although the software does not prevent it, preconfiguring 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 the 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:
Cable5/1/4: Bad rx packet. JIB status code 0xA
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Important Notes
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 (MD) hosts sharing the wideband 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 occurs on cable line cards, the available CIR bandwidth gets partitioned and is 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 percentage configuration and traffic distribution, the overall link utilization of
dynamic bandwidth sharing (DBS) can be as low as 85 percent. For example, this can occur if the traffic
rate on a wideband interface is smaller than its configured bandwidth percentage, but the traffic rate on
a modular-cable interface is much larger than its bandwidth percentage. The packet drops occur only on
the modular-cable interface which has a larger amount of traffic than its bandwidth-percentage. To
workaround this scenario, configure a higher bandwidth percentage to the modular-cable interface,
which is larger than or equal to its expected or average traffic rate.
Important Notes
Note
This section describes important changes in various Cisco IOS Releases that differ from support found
in earlier software releases supported by the Cisco CMTS routers. 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.
Table 6 identifies some of the key changes that you should consider when running
Cisco IOS Release 12.2(33)SCA.
Table 6
Important Changes in Cisco IOS Release 12.2SC
Change Description
Release Introduced
Clearing Address Resolution Protocol (ARP) Entries
12.2(33)SCA
Using the clear arp command can take about 15 seconds to remove all ARP table
entries.
Reverse Path Forwarding
12.2(33)SCA
RPF on the Cisco uBR10012 router requires configuration of the ip verify
unicast source reachable-via rx allow-default command to properly interpret
default routes.
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Introduction
Obtaining Documentation and Submitting a Service Request
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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2
Caveat List for Cisco IOS Release 12.2(33)SCA
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)SCA2
•
CSCsr09423
Symptom: When UCD change occurs, some data structures related to US scheduler of secondary
upstream service flows do not get properly updated. One example is minislot size. Hence any traffic
through these service flow might get affected.
Workaround: There is no workaround.
•
CSCsv82525
Symptoms: When setting wideband interface to secondary through SNMP, it doesn't work as
expected.
Conditions: This symptom is observed in a wide band cmts which configure the wide band
interfaces.
Workaround: Modify the wideband configuration through the CLI.
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Caveat List for Cisco IOS Release 12.2(33)SCA
CSCsv90935
Symptoms: When query for the entPhysicalName output there is a mismatch in the SFP output for
Cisco IOS Release 12.3(21)BC and 12.2(33)SCA or the Cisco Wideband SPA showed twice when
using the show inventory command.
Conditions: When there are Cisco Wideband SPAs on a Cisco Wideband SIP, use the show
inventory command or query for the entPhysicalName, the Symptom happens.
This Symptom does not affect other functions of a Cisco Wideband SPA.
Workaround: This a cosmetic mismatch of the SFP output string. Be aware that the outputstring is
different between Cisco IOS Release 12.3(21)BC and 12.2(33)SCA.
•
CSCsq64227
Symptoms: The Number of Downstream PHS rules for a Cable MAC Domain stays the same even
though more Downstreams can be added to the MAC Domain (via Modular Downstreams).
Conditions: A MAC Domain can have 4K Downstream PHS rules. This is the current limit.
Workaround: There is no workaround.
•
CSCsr12024
Symptoms: With the wideband multicast BPI and wideband host HA configuration, the line card
crashes while syncing BPI data.
Conditions: This occurs when there are a large number of BPI multicast keys in wideband host data.
It causes line card memory corruption and eventually crashes the line card.
Workaround: Disable the wideband multicast BPI configuration or disable the wideband host HA
configuration.
•
CSCsr30738
Symptoms: SLOWRPC error message seen in IPC code while the Cisco uBR10000 is booting up.
Workaround: There is no workaround.
•
CSCsr52709
Symptoms: On a Cisco uBR10000 Service flow counts are not updated for downstream service flows
handled by the 24 RF channel SPA. As a result dynamic service flows for voice may be torn down
when the T8 (inactivity) timer expires.
Conditions: Occurs when SPA in Bay 0 is inserted but the GigE link is disconnected or down.
Workarounds: Ensure that the SPA0 GigE link is up whenever SPA 0 exists.
•
CSCsu53992
Symptoms: On a Cisco uBR10000 running Cisco IOS release 12.3(23)BC3, the following message
is seen when the show cable modem is used: "Warning: Zero Blaze index for SFID 173 "
Conditions: Cosmetic issue, not affecting the real data flow
Workarounds: There are no workarounds.
•
CSCsu85219
Symptoms: The indexes maintained for the 24 RF-channel SPA do no get freed after modems using
SPA downstream get reset or deleted by using the clear cable modem cx/y/z all reset|delete
command.
Conditions: The 5x20 host of the modular cable interface is using non-default downstream channel
ID.
Workarounds: Use the clear cable modem all reset command.
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•
CSCsv87940
Symptoms: SNMP Set of docsIf3MdCfgIpProvMode returns COMMIT_FAILED_ERROR. It
should be supported to set.
Conditions: SNMP Set of docsIf3MdCfgIpProvMode.
Workarounds: Use CLI to change the IP prov Mode
•
CSCsv23434
Symptoms: When a policy-map is applied inbound on a GRE tunnel, the GRE tunnel outbound
traffic is policed.
•
CSCsr12068
Symptoms: AFter PRE Switchover, show cable privacy root-cert provides no ouput
Conditions: The problem is only on uBR10K, and occurs after PRE failovers. Resetting all modems
does not bring back the certificates on the PRE, although the modems do come online(pt) on the line
cards. Performing a LC failover after the PRE failover does cause the values to be re-populated.
Workarounds: Wait till the Modems come up an learn the certificiations, and they will be
repopulated again.
•
CSCsq45997
Symptoms: Throughput rate shows (slightly) more than than the expected range.
Conditions: Happens when DMIC feature enabled and modem marked with given MAX rate values.
This can also happen when QoS profile has got lower Max rates.
Workarounds: No known workaroud exists. This behaviour is mostly due to smaller value of the
MAX-rate, which is not very much applicable with customer scenario. Also the slight change on the
throughput values does not have impact on other functionalities.
•
CSCsr27974
Symptoms: The show cable qos profile command shows an incorrect value for the number of
modems that has come online with the CM generated QOS profile, in the standby PRE.
Conditions: When the CM comes online with DOCSIS1.0 config file, it creates a profile which can
be seen in "show cable qos profile". Modems are registered with qos profile.
The show cable qos profile command does not show the correct value for the number of modems
that has come online with the cm-created profile in the standby PRE, but the modems are registered
with the cm-created profile in the active PRE.
Workaround: There is no workaround.
•
CSCsu18117
Symptoms: The multicast fastswitching path has overwritten the ToS value of the multicast packet.
ToS value is correct via process-switching path.
Workaround: There is no workaround.
•
CSCsv58913
Symptoms: When a cisco uBR series CMTS is configured to perform CPE IP to MAC address
resolution through the use of DHCP LEASEQUERY messages rather than ARP the address
resolution will fail when it is inspired by downstream packets to the unresolved destination.
Workaround: Temporarily allow downstream ARP resolution with the cable bundle interface
commands cable arp and cable proxy-arp.
•
CSCsu37019
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Symptoms: IGMP join from a cable CPE is timed out improperly by the CMTS
Conditions: IGMP query interval is set to a large value on the cable bundle interface.
Workarounds: There are no workarounds.
•
CSCsu53695
Symptoms:When MVPN is configured on the CMTS, and a CPE joins a multicast group that a
source is already transmitting to, then the (S,G) entry is not created in mvrf table of the CMTS.
Workarounds: There are no workarounds.
•
CSCsr15678
Symptoms: Traceback observed after a uBR10000 PRE
switchover%COMMON_FIB-4-FIBNULLHWIDB: Missing hwidb for fibhwidb Tunnel1 (ifindex
144)
Conditions: Multicast VPNs are configured
Workarounds: There are no workarounds.
•
CSCsm55179
Symptoms: After a N+1 line card switchover to protect and revert back to working, the standby PRE
may reset with some configurations.
Conditions: The problem has been observed when removing some DSG configuration after the
revert back, particularly when executing the command "no cable dsg tg". In the error case, the
standby PRE resets and the configuration is re-synced with the active PRE.
Workarounds: There are no workarounds.
•
CSCsu58767
Symptoms: Modems registerd on remote modular interface may go offline and quickly back online
during line card revertback when "cable default-phy-size" or "cable upstream x ingress cancellation"
are not same as default value.
Conditions: This condition occurs only when "cable default-phy-size" or "cable upstream x
ingress-noise-cancellation" are not same as default value or only modems registered on remote
modular interface will be affected, or only during line card revertback.
Workaround: Use the default cable default-phy-size or default cable upstream x
ingress-noise-cancellation commands on the interface.
•
CSCsv37726
Symptoms: Using the show int <wb intf> downstream command displays 0/0 for
"reserved/reservable" bandwidth
Conditions: With some wideband interface reserved bandwidth execute N+1 switchover
Workarounds: No workarounds. Can have correct data from output using the show hw-module bay
bay number wideband wideband interface number command.
•
CSCsu18100
Symptoms: When RSA keys for use by SSH are generated on a Cisco uBR10000 series CMTS with
the configuration command crypto key generate rsa the generated RSA keys are not synchronized
across to the standby PRE. This means that SSH will not work if the standby becomes active.
Workaround: Use telnet to connect to the system when the standby PRE is active.
•
CSCsv70687
Symptoms: Traffic is not encrypted even with BPI enabled.
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Conditions: If BPI is enabled and there is no SPA in bay 0, traffic will be sent in the clear instead of
being encrypted.
Workaround: A workaround is to always leave a SPA in bay 0. If for some reason the SPA in bay 0
must be removed and there is still a SPA in bay 1, move the SPA in bay 1 to bay 0 and continue
service with the SPA in bay 0.
•
CSCso39755
Symptom: Some voice Calls DS service flow counters increase drastically after LC SO. It will
reduce to its normal values but will become abnormal value again if the time between two
executions of the show interface Cx/y/z service-flow xxx counters/qos command is long enough.
•
CSCsu22450
Symptom: Inactive sessions are observed in the multicast explicit tracking database.
Conditions: IGMP leave received for a group followed by a CLC switchover
Workaround: None
•
CSCsv29600
Symptom: If the modular interface is deleted from legacy interface,trace back "lb:
Mo1/0/0:2:handle_stats_report_common(): no stats data "will show up and modem from other Line
card could wait to come on line on inf that interface.
Conditions: CMTS has configured modular cable interface with load balance group, and this load
balance group includes interface from other Line card.
Workaround: Modular interfaces is not included in Load balance group that has interface from other
line card.
•
CSCsu78591
Symptom: Occasionally when inter cable line card load balancing is enabled, a spurious memory
access occurs.
•
CSCsr20944
Symptom: The show interface bundle command or show interface bundle sum/stat command shows
the wrong rate, then the rate value becomes 0 after a while.
Conditions: The data rate reaches a large value, such as 2G. It depends on the load-interval value
and the rate.
Workaround: None
•
CSCsv11435
Symptom:When modem comes up during off-peak time when it is not supposed to be monitored as
per enforce-rule configured, the smp is not synced to standby LC.
Conditions: If an LC- Switchover is done during off-peak time, even if the modem enters peak-time
it is not monitored as per the enforced rule configured.The smp is synced to standby LC only once
the modem is monitored during peak-time.
Resolved Caveats — Cisco IOS Release 12.2(33)SCA2
•
CSCsq53782
Symptom: An INFO level alarm is raised when using non-default config for "max-ports"and
"connector" on an upstream port even though the port is actually up and running.
[Sample Alarm]
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Source Severity ACO Description [Index]
------ -------- --- ------------------Cable5/0-US19 INFO NORMAL Physical Port Administrative State Down [1]
Conditions: Non-default value is configured for "max-ports" and "connector" on Cable upstream
port.
[Sample Config]
Ca5/0/3
cable upstream max-ports 5
cable upstream 0 connector 12
cable upstream 1 connector 13
cable upstream 2 connector 14
cable upstream 3 connector 15
cable upstream 4 connector 16
Ca5/0/4
cable upstream max-ports 3
cable upstream 0 connector 17
cable upstream 1 connector 18
cable upstream 2 connector 19
Workaround: There is no workaround.
•
CSCsu30702
Symptom: Customer is trying to snmpwalk the CMTS (UBR 10000). He sees that a packet has been
sent, but never gets a response back. The SNMPWALK times out eventually.
Conditions: Customer has a UBR10000 series router running 12.3(21a)BC4
Workaround: Don't use the MIB object 'sysClearARP' to clear arp table, use CLI instead.
•
CSCsu44606
Symptom:Duplicate traps are generated at the end of 'file mode SAMIS' write operations when
configuring SNMP traps for Cable billing operations.
Conditions:Setup per
http://www.cisco.com/en/US/docs/ios/cable/configuration/guide/cmts_use-bsd_bill.html#wp10271
95
Workaround: There are no workarounds.
•
CSCsq79058
Symptoms: Unable to set the MIB objects "ccwbRFChanQamIPAddress",
"ccwbRFChanQamMacAddress" and "ccwbRFChanQamUdpPort" separately.
Conditions: This occurs on a Cisco uBR10012 router running
ubr10k2-k9p6u2-mz.122-122_33_SCA when the MIB objects are individually set using the SNMP
set command.
Workaround: Set the MIB objects "ccwbRFChanQamIPAddress", "ccwbRFChanQamMacAddress"
and "ccwbRFChanQamUdpPort" using one SNMP set command.
•
CSCsu97227
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Symptom: A incorrect value may be displayed in the show interface Cablex/y/z with 256QAM is
enabled. The value should be BW 37500 Kbit. A degradation of service may be experienced when
the behavior is observed.
Conditions: uBR10012 with IOS's 123-17b.BC3 & 123-23.BC2.
Workaround: Reverting the modulation from 256QAM to 64QAM and back to recover.
•
CSCsi94641
Symptoms: Wideband modems associated with the first shared port adapter (SPA) do not display
wideband counters as expected for the downstream service flows.
Conditions: This occurs on a Cisco uBR10012 router running Cisco IOS Release 12.2SBU05. The
wideband modems associated with the first SPA in 1/0/0 bay have their downstream service flow
counters incremented as expected. But the wideband modems in 1/0/1 bay do not show incrementing
counters for their downstream service flows.
Workaround: There is no workaround.
•
CSCso63578
Symptom: A Cisco uBR10012 running 12.3(23)BC1 may experience a memory leak in "Pool
Manager". Use show processes memory to view memory. Alternatively, you can monitor via the
ciscoMemoryPoolUsed MIB object.
Conditions: Mixture of best effort data traffic, UGS voice traffic and SNMP polling.
•
CSCsr68412
Symptom: Duplicated CALEA request to CMTS when doing FCNA with BTS version 4.5 or before.
SII code working well with BTS 5.0 or later due to no duplicated PacketCable CALEA requestion
at FCNA. This fix make CMTS CALEA working with early version BTS at FCNA case.
•
CSCsq53519
Symptoms:The configuration command default cable upstream rate-limit is interpreted as no
cable upstream rate-limit instead of cable upstream rate-limit token-bucket shaping.
Workaround: Configure the cable upstream rate-limit token-bucket shaping command instead of
the default CLI.
•
CSCsl87023
Symptom: Running-config and the show controllers command have different values for upstream
center frequency. Also, 16 KHz resolution is not proper for newer line card.
Conditions: Configure fixed upstream center frequency.
Workaround: This is a sort of cosmetic issue, no side effect.
•
CSCsr19333
Symptom: Seeing %LCINFO-4-LCHUNG error messages line card is not coming up.
Conditions: With multiple loads and unloads of fdiag image line card is not coming online.
Workaround: There are no workarounds.
•
CSCso75347
Symptom: When the cable dhcp-giaddr policy strict command is configured at the Cisco CMTS,
the CPEs behind the CMs are expected to get the DHCPOFFER message with its source IP address
belonging to the secondary IP Network Address range of the downstream Cable interface in the
CMTS. Currently the DHCPOFFER has the source IP-Address from the downstream's primary IP
Network address range.
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Conditions: The issue occurs when the cable dhcp-giaddr policy strict command is configured at
the CMTS cable downstream interface.
•
CSCsr47518
Symptom: A Cisco uBR10012 may reload due to a bus error.
Conditions: This has been seen on a UBR10000 running 12.3(23)BC1.
Workaround: There is no workaround.
•
CSCsr56760
Symptom: Incorrect last test pass time from cli show diagnotstic result subslot x/y detail
Conditions: When we execute the offline-filed diagnostic tests, the last test pass time is not showing
correctly.
Workaround: Use the show diagnostics events subslot x/y command to see the correct last test pass
time.
•
CSCsr50501
Symptom:
The Cisco uBR10012 router has spurious memory traceback observed while testing Field
Diagnostics.
Conditions: After loading the fdiag iamge to the line card starting and stoping the ood tests some
times crashing the PRE.
Workaround: There is no work-around.
•
CSCsv05377
Symptom:All the CPEs/Hosts/MTAs behind the Cable Modems on existing bundle sub-interface
will be disappeared or deleted from the CPE table when a new Cable Bundle sub-interface is added
with ip address. Same issue will also happen when newly created bundle sub-interface is deleted.
IP connectivity will be broken from CMTS to those CPEs/Hosts/MTAs as they are deleted from CPE
table.
Conditions: Above issue has been observed on uBR10k with PRE2 running IOS 12.3(21a)BC8,
12.3(23)BC2 and 12.3(23)BC4 images.
Workaround: There is no workaround.
•
CSCsu90554
Symptom: CPE devices behind CableHome devices are not able to acquire IP address via DHCP
when the cable helper-address x.x.x.x host command is used under the cable bundle interface.
Conditions: Problem is seen on a CMTS ubr10k with IOS 123-23.BC4. The problem has only been
observed for the CPE devices with CableHome devices like Netgear. CPE device behind Cable
Modem do acquire IP address via DHCP just fine and work as expected.
Workaround: Configure the cable helper-address x.x.x.x command without host option at the end
of the command line under the cable bundle interface.
•
CSCsv60137
Symptom: the behavior of the priority setting isn't working correctly. A default MQoS group is
required for proper implementation of MQoS over an MPLS VPNs. The default group config must
appear before any other MQoS group config in the startup config in order for the feature to work
correctly after a reload. For example:
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!
cable multicast qos group 1 priority 255 global
session-range 224.0.0.0 224.0.0.0
group-qos 2
vrf VOIP
!
cable multicast qos group 2 priority 2 global
session-range 239.255.70.7 255.255.255.255
group-qos 1
vrf VOIP
!
However, testing shows that the default group with priority 255 matches all mcast traffic indicating
that priority 255 is in fact a higher not a lower priority. Thus, session-range 239.255.70.7
255.255.255.255 will never get used.
Workaround: There are no workarounds.
•
CSCsq77686
Symptom: Standby PRE Reset
Conditions: Sequence:
1. delete the service class used by multicast default group-qos
2. perform PRE sw
3. all group-qos configurations under qos group are removed on standby PRE, while exist on active
PRE
4. try to modify group-qos under qos group on active PRE, standby PRE will be reset for
configuration mismatch.
Workaround: Delete all group-qos configuration before deleting the service class used by multicast
default group-qos.
•
CSCsr15208
Symptom: Wideband SPA may not accept the SFP with S/N starting with "AG" after OIR the
SFP.You will see below log message when you run into this condition.
*Jul 1 19:38:42.887: %SPAWBCMTS-4-SFP_UNINITIALIZED: Modular-Cable 1/0/0, Unknown
SFP inserted in port 0 failed initialization
This message itself will display when non-Cisco SFP is inserted into the SPA, but the above
SFP is indeed made from Cisco.
Conditions: SFP has S/N starting with "AG", and OIR has been performed on the the SFP one or
several times.
Workaround: Execute the hw-module bay x/y/z reload command.
•
CSCsr40037
Symptom: Interrupt counts displayed by the show command show controller Modular-Cable brief
are incorrect since these counts are accumulated on per jacket card basis and not per SPA i.e.
controller Modular-Cable basis.
Conditions: Normal operating conditions.
Workaround: There is no workaround.
•
CSCsl57014
Symptom: Cisco uBR10012 PRE crash.
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Conditions: Executed the show ip interface brief command soon after load and bootup
Workaround: There is no workaround.
•
CSCsl74859
Symptoms: If the show cable modem command is used after a PRE switchover, cable modems are
duplicated with the same MAC address.
Conditions: This issue occurs on a Cisco uBR10000 series router running Cisco IOS Release
12.3(00)BC3.
Workaround: There is no workaround.
•
CSCsr48745
Symptom:After line card switchover or revertback, some modems go offline, and us phy register
shows late map issue.
Conditions: This condition occurs when dynamic map-advance safety is configured not big enough.
Workaround: Use a large dynamic map-advance safety value or use static map-advance.
•
CSCsr93439
Symptoms: In some situation, we do LC SO and revertback, we got the CMs on some upstream
offline, and never online again because the PHY is in error state. It occurs on both BC2 and BC3
image.
Conditions: There are many upstream channels in no-shut state in 520H line card. Do switchvover
and then revertback. Sometimes we can see this bug.
Workaround: When this problem happens, shut/no-shut the interface could recover this problem.
•
CSCsr87405
Symptom: Line card crashes.
Conditions: When doing pre-switchover, ISSU or running the clear cable mode command, there is
a chance to hit this line card crash issue.
Workaround: There are no workarounds.
•
CSCsm93293
Symptom: Protect card are forwarding data for two or more working cards. And some CM fall
offline.
Conditions: There are some interfaces admindown in working cards.
Workaround: Revert back to the working card.
•
CSCso73405
Symptom: Traceback was observed on both active RP and standby RP.
Conditions: Issue line card switchover when active RP is syncing configuration to standby RP.
Workaround: Do not perform a linecard failover until standby RP reach Standby_Hot state (for SSO
mode) or Standby_Cold (for other PRE HA mode, like, RPR mode) .
•
CSCso74192
Symptom: Show cable clock command may show that number of TCC Cards in the Chassis: 255".
In fact, it should only show up "2" maximum for slot 1/1 and slot 2/1.
router#show cable clock
Load for five secs: 23%/8%; one minute: 26%; five minutes: 27%
Time source is NTP, *13:27:28.715 EDT Mon Apr 14 2008
Number of TCC Cards in the Chassis: 255
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Active TCC Card is in slot: 2 subslot: 1,(DTCC Eightbells card)
Backup TCC Card is in slot: 1 subslot: 1,(DTCC Eightbells card)
Clock reference used by the active card is Local Oscillator
Conditions: Removed TCC or DTCC cards and performed a PRE switchover.
Workaround: Perform another PRE2 switchover.
•
CSCso76704
Symptom: When perform PRE switchover, it gave the following errors: UBR10K-1#redundancy
force-failover main-cpu. Proceed with switchover to standby PRE? [confirm]y
% HCCP 1 50 Switchover in progress.
HA system in transient state, switchover aborted.
Conditions: One or more CLC is locked out.
Workaround: Execute the redundancy linecard-group unlockout x/y command, do PRE
switchover, and then lockout x/y again.
•
CSCsv12217
Symptom: With an unrecognized LCP linecard present in the uBR10k chassis the standby PRE will
not be allowed to come up.
Workaround: Remove the unsupported line card from the chassis.
•
CSCsq02262
Symptoms: IPC timeout does not trigger linecard switchover.
Conditions: The sync-pulse failure was designed to trigger linecard switchover but based on the
HCCP design, IPC timeout should trigger linecard switchover.
Workaround: There is no workaround.
•
CSCsu08086
Symptom: All modems go offline on the protect port after LC swithover and never come back online.
Conditions: The cable default-phy-burst command is configured as some value other than
default(=2000).
Workaround: Shut/no shut the upstream port, and configure the cable default-phy-burst command
with the default value.
•
CSCsq19079
Symptoms: Inconsistent running-configuration between active and standby after route processor
switchover.
Conditions: This occurs with global N+1 configured and after a route processor switchover.
Workaround: There is no workaround.
•
CSCsq23758
Symptom:US throughput would drop by half after 12-18 minutes for WB modems
Conditions: Images using 12.3(23)BC
Running config would have cable upstream X rate-limit token-bucket shaping, where X is the
upstream number
Workaround: Configure the CMTS without the shaping command. Example:
cable upstream X rate-limit token-bucket, where X is the upstream number.
•
CSCsv28814
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Symptom: PRE crashes. The crash might happen in only 12.2S based images since the fix was not
ported from 12.3 based images correctly.
•
CSCsq72700
Symptoms: If DSA/DSC-REQ is sent by the eMTA with DOCSIS Nominal Grant Interval set to 0
then CLC would crash.
Conditions: Misbehaving eMTA with DOCSIS Nominal Grant Interval for a UGS-AD service flow
is set to 0 which according to the spec is incorrect.
Workarounds: Turn off silence suppression.
•
CSCsj40978
Symptom: BPI+ sessions may fail when root certificates are not present in the router.
Conditions: This issue occurs when the router checks for “root-cert” or “euro-root-cert” certificate
at boot-time or when it receives a BPI+ session request.
Workaround: The “root-cert” and “euro-root-cert” certificates are included in the IOS image itself
from Cisco IOS Release 12.2(33)SCA2 onwards. These files are no longer required to be stored on
the bootflash.
•
CSCsr05759
Symptom: If the CM is cleard on the CMTS, the CMTS forwards its DHCP Discover via the VRF
of the first bundle interface, just as expected. If the CM is rebooted instead, the CMTS forwards its
DHCP Discover via another VRF. The subsequent DHCP Request is sent via the correct VRF, so
that it cannot be correlated to the DHCP Offer.
Conditions: When multiple bundle interfaces with unique VRFs are associated with the same
downstream:
Workaround: Either terminate VRFs on a single DHCP server ignoring VRF values or keep clearing
the CMs with a script.
•
CSCsr70184
Symptom:Gate is refused due to exceeded activity although the subscriber has no gate assigned to it.
Conditions: Running packet cable.
Workaround: Increase the Activity count in the gate set message.
•
CSCsr78824
Symptom: When removing the configuration “cable privacy accept-self-signed” and attempting to
configure a manufacturer's self-signed certificate onto the bootflash: of the CMTS by using the
filename “root-cert” or “euro-root-cert”, the self-signed certificate appears to be loaded, but the
devices still cannot come online(pt). BPI+ negotiation fails as the self-signed manufacturer
certificates are not configured as ‘trusted’.
Conditions: Attempts to provision a non-DOCSIS compliant cable modem whose BPI+ certificate
is not signed by a signing authority (eg: self-signed) while the CMTS is configured to reject
self-signed certificates will fail. Attempting to load a copy of the manufacturer’s cert into the
bootflash of the device as a workaround does not work.
Workaround: There is no workaround. Only modems chaining to the US or EU root certificates are
considered valid.
•
CSCsr07340
Symptom: Backup TCC card may experience a reload with following messages in PRE log
%IPCOIR-3-TIMEOUT: KA Timeout: slot2/1, LRCV:00:00:14
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LKA:00:00:09 LRMV:never, NKA:00:00:00, cpu 16%/5% 18%
%IPCOIR-3-TIMEOUT: KA Timeout: slot2/1, LRCV:never LKA:never
LRMV:never, NKA:00:00:00, cpu 16%/5% 18%
%IPCOIR-2-CARD_UP_DOWN: Card in slot 2/1 is down. Notifying
2cable-tccplus driver.
Conditions: The issue has been experienced on uBR10K running 12.3(23)BC1
Workaround: There are no workarounds.
•
CSCsu36225
Symptom: Two upstream ports on the same PHY receiver of a MC520H line cards show SNR
degradation about 10 dB.
Conditions: Ingress-noise cancellation on.
Workaround: There are no workarounds
•
CSCsr21171
Symptom: When invoking the 'show cable modem' or related commands the following warning will
be displayed "Warning: Zero Blaze index for SFID "
Conditions: When the CM/SF is in this state the traffic to the CM won't be impacted but the stats
counters for the SF will report invalid numbers.
Workaround: The CM that is impacted can be reset during maintenance windows.
•
CSCsu70792
Symptom: DHCP assignement failed to CPE
Conditions: Using 2 CPEs on on CM with the second using the UNICAST DHCP DISCOVER
(broadcast bit == 0)
Workaround: Delete the modem using the clear cable modem mac addres delete command. Then
use a CPE settting Broadcast bit.
•
CSCso61937
Symptom:520U card crashes due to memory corruption running 12.3(23)BC1.
Conditions: This only occurs when the CLC is subjected to a constant 80 to 100 % CPU load over
a long period of time, a storm created by repeated and non rate limited cli invocations targeting the
line card. Show tech and show controller are couple of examples of the cli calls that are invoked
every 2 seconds as part of the scripts to reproduce the bug .
Workaround: Show tech and show controller cli calls result in reading of a long list of internal
register values from the IPC mac controller while disabling the interrupts for a long time, which is
not desirable when the system is under severe stress.
As a workaround, the mac device registers are not read when the show tech or show controller cli
calls are invoked under normal circumstances. If the mac controller internal register values are need
to be read, a debug flag is provided to accomplish that.
The debug cr10k-clc amd command can be called explicitly to turn on reading of the register
contents of the mac controller.
•
CSCsq96642
Symptom: In the walk output of the table 'cpmProcessTable', process
corresponding to process id 256 is not listed.
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Conditions: Steps to reproduce:
1. Configure snmp-server on the DUT.
2. On the DUT exec 'show processes cpu sorted | inc 256'. It returns the
details of the process for id 256.
3. For example, walk on the OID: '1.3.6.1.4.1.9.9.109.1.2.1.1'. This returns
the process names for all the running process. In this output the id 256 is
missing.
4. Get on the particualr instance returns 'No Such Instance' error message.
Workaround: There are no workarounds.
•
CSCsr74835
Symptom: Certain sprintf() calls in tcp/telnet.c are incorrect.
Conditions: They have the potential to overflow the destination buffers.
Workaround: snprintf() should be used with a bounding length of the size of the destination buffer.
•
CSCso96838
Symptom: Secondary PRE2 crashes.
Conditions:
no exception-slave core-file ubr3
no exception-slave dump 172.18.98.28
no exception core-file ubr3
no exception dump 172.18.98.28
After removing the last command of "no exception dump 172.18.98.28" and then wr
Workaround: Don't remove exception in 12.3(23)BC1.
•
CSCsr23126
Symptom: Upstream Load Balancing Breaks with DOCSIS 3.0 modems in w-online(pt) state.
Conditions: UBR10k running 12.3BC with D3.0 modems online.
Workaround: There is no known workaround for performing upstream channel change with modems
in w-online(pt) state.
•
CSCsq37824
Symptom: This is a internal coding issue, and have the possibility to cause memeory overflow.
Conditions: Found by source code analysis.
Workaround: There is no workaround.
•
CSCsq05652
Symptom: Incorrect display of active calls when nRTPS/RTPS is configured. The RTPS/nRTPS is
interpreted as a "call" in the output of the "show cable calls" and "show cable modem calls"
commands.
Condition: The problem only occurred when nRTPS or RTPS is configured.
Workaround: Use the show packetcable gate summary command to check how many calls on
going.
•
CSCsu40034
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Symptom: Configure bundle sub-interface, and traceback occurs occasionally.
Conditions: If we create a bundle firstly and then delete it. After these, we use command "cable
bundle " configure it to one interface, this bundle will be created again, and then if we configure a
sub-interface of it, the traceback occurs. It's seen in 12.2S and 12.2SCA, but not seen in 23BC.
Workaround: There is no workaroud.
•
CSCsq66130
Symptom:Flowbits keep asserting after SPA OIRed, and traceback observed when "show pxf cpu
queue xxx". The traceback can only observed in 12.3(23)BC.
Conditions:SPA OIR will trigger the flowbits problem. And queue deletion is condition for the
traceback.
Workaround: There is no workaround.
•
CSCsq60616
Symptoms: When editing the service class name in an enforce-rule, tracebacks/crashes were
observed on the linecard.
Workaround: When the registered service class name is to be changed, remove the enforce rule and
configure it with the updated service class name.
•
CSCsr63088
Symptom:Static upstream LB may be unbalanced in some scenrios. It doesn't happen with dynamic
or static downstream LB.
Conditions:Static LB was configured on an interface with more than one upstream.
Workaround: Enable dynamic LB. If interface has more than two upstream. There should be a little
chance to get unbalance result.
•
CSCsr03421
Symptom: Standby PRE crash at the time more than 512 calls are on going.
Conditions: Only occured at the time 2 gates with the same offset are in the free gate list.
Workaround: Remove the Standy PRE.
•
CSCsr92986
Symptoms: CNR is not shown for freq stacked upstreams. For example, if the following
configuration is used on a 1x4 mac domain:
Conditons: cable upstream 0 connector 0 shared, cable upstream 1 connector 0 shared
Only US0 will show a CNR value in the show controller cx/y/z upstream command. US1 will show
only a MER value. This can break CNR based freq hopping as show cable hop thresholds does not
display a CNR for the affected upstream either.
Workaround: Do not use freq stacking.
•
CSCsr04644
Conditions: If "debug cr10k_rp" is on, the traceback may be observed when an arp entry on a bundle
interface is to be deleted, or at the first time being created.
Workaround: There is no workaround.
•
CSCsh69471
Symptom: AAA accounting records for commands executed from remote host using rsh are sent
with empty username. The username sent in exec accounting record and command accounting
record is empty.
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Conditions: Occurs for the commands execute from remote host using rsh.
Workaround: One can consider stopping generation of accounting records with "null" username by
using the aaa accounting suppress null-username command.
•
CSCsv24663
Symptom: When cable metering is enabled, the following scheduler thrashing error message has
been seen in PRE log related to all cable linecards:
SLOT 5/0: Oct 14 23:31:32 EDT: %SCHED-3-THRASHING: Process thrashing on watched
message event.
-Process= "CMTS METERING Collection Process", ipl= 4, pid= 105
-Traceback= 6013579C 60135880 60585190 60584C58 601134B4 60113498
Conditions: Above problem has been observed only when "cable metering" is configured on
uBR10K with PRE2 running 12.3(23)BC2 image.
Workaround: There is no workaround.
•
CSCsj12495
Symptom: In a high availability configuration with multiple PREs the standby PRE may reload when
a new linecard is inserted.
Conditions: This issue may occur when inserting a new linecard in the chassis.
Workaround: There is no workaround available.
•
CSCsu88884
Symptom: Spectrum Management sometimes fails to assign upstream frequencies to cable
interfaces after an OIR operation. For example replacing an MC520U with an MC520H with
OIR-compatibility enabled might trigger the problem.
– oir-compatibility configured for the slot
– configuration saved
– cable power off <#>
– MC5x20U pulled out, MC5x20H inserted
– cable power on <#>
When the problem occurs the upstream channels will display "Frequency not set" in the US sections
of the show controller command. The show running interface command will show that the affected
US channels are included in a spectrum management group.
interface Cable<#>
cable downstream frequency <#>
no cable downstream rf-shutdown
cable upstream 0 spectrum-group <#>
no cable upstream 0 shutdown
cable upstream 1 spectrum-group <#>
no cable upstream 1 shutdown
cable upstream 2 spectrum-group <#>
no cable upstream 2 shutdown
cable upstream 3 spectrum-group <#>
no cable upstream 3 shutdown
Cable<#> Downstream is up
Frequency <#> MHz, Channel Width <#> MHz, <#>-QAM, Symbol Rate <#> Msps
<..>
Cable<#> Upstream 0 is down
Frequency not set, Channel Width <#> MHz, <#>-QAM Symbol Rate <#> Msps
This upstream is mapped to physical port <#>
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Spectrum Group <#>
<..>
Cable<#> Upstream 2 is down
Frequency not set, Channel Width <#> MHz, <#>-QAM Symbol Rate <#> Msps
This upstream is mapped to physical port <#>
Spectrum Group <#>
<..>
The failure might also occur after an MC520U or MC520S is installed into a previously empty,
unconfigured slot.
Conditions: The problem might occur if an upstream channel is configured for Spectrum
Management and included in a Fiber Node.
Workaround: Remove the failing US channels from the fiber node then re-insert them. If that doesn't
correct the problem reload the CMTS.
•
CSCsq84686
Symptoms: All modems on a given upstream may go offline when the problem occurs.
Workaround: shut and follow by no shut of the cable upstream interface by using the following
commands:
– cable upstream [x] shut
– no cable upstream [x] shut
Open Caveats — Cisco IOS Release 12.2(33)SCA1
The open caveats are grouped based on their component types. The open caveats documented from prior
releases that are unresolved might also apply to this release.
CMTS-Application
•
CSCsl74859
Symptoms: If the show cable modem command is used after a PRE switchover, cable modems are
duplicated with the same MAC address.
Conditions: This issue occurs on a Cisco uBR10000 series router running Cisco IOS Release
12.3(00)BC3.
Workaround: There is no workaround.
•
CSCsl92463
Symptoms: The show interface cable modem command output is misaligned with the column
headings and a heading is missing for the dual IP flag.
Conditions: The show interface cable modem output shows a 'Y' or 'N' but the field does not have
a heading for this Dual IP field.
Workaround: The output needs to be aligned with the heading fields. See the show interface cable
modem command documentation in the Cisco IOS CMTS Cable Command Reference.
•
CSCsm14437
Symptoms: In rare occasions, a service flow with minimal reserved rate requirement may get
admitted but no traffic can be sent over it.
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Conditions: This occurs when a service flow tries to reserve more than 99% of the bandwidth. Only
99% of the bandwidth that is shown as reservable in show interface cable downstream command
can actually be reserved.
Workaround: There is no workaround.
•
CSCso60260
Symptoms: The PRE2 revision number is not displayed in the show version command output.
Workaround: There is no workaround.
CMTS-Management
•
CSCsq79058
Symptoms: Unable to set the MIB objects "ccwbRFChanQamIPAddress",
"ccwbRFChanQamMacAddress" and "ccwbRFChanQamUdpPort" separately.
Conditions: This occurs on a Cisco uBR10012 router running
ubr10k2-k9p6u2-mz.122-122_33_SCA when the MIB objects are individually set using the SNMP
set command.
Workaround: Set the MIB objects "ccwbRFChanQamIPAddress", "ccwbRFChanQamMacAddress"
and "ccwbRFChanQamUdpPort" using one SNMP set command.
CMTS-Platform
•
CSCsq16982
Symptoms: The network interface on a Cisco uBR10012 router fails to acquire a global IPv6 address
when using IPv6 autoconfiguration on an interface.
Conditions: The Cisco uBR10012 does not support stateless address autoconfiguration (SLAAC) for
cable modems or CPEs. However, SLAAC should be supported for the CMTS router network
interfaces.
Workaround: Configure a static IPv6 address on the network interface.
CMTS-Redundancy
•
CSCsl35163
Symptoms: The range-backoff configuration value changes from "range-backoff 3 6" to
"range-backoff automatic" for upstream in a frequency stacking scenario.
Conditions: This change is noticed after the following commands are executed to un-configure and
re-configure the cable interface.
1.
cable upstream max-ports 6
2.
no cable upstream max-ports
3.
cable upstream max-ports 6
Workaround: Modify the range_backoff value in the cmts_mac_hwsb_us_init file according to the
linecard type.
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•
CSCsl49206
Symptoms: If the associated HA ip host commands are removed followed by PRE switchovers from
PREA to PREB and then from PREB to PREA. After re-configuring the Global HA commands, all
modems disappear, re-range and then come back online.
Workaround: There is no workaround.
•
CSCsm00986
Symptoms: Traceback occurs when the Hot Standby Connection-to-Connection Protocol (HCCP)
member is removed through the console and when the show hccp channel-switch command is run
from the VTY session almost simultaneously.
Workaround: There is no workaround.
•
CSCsm50955
Symptoms: A Cisco uBR10012 router with N+1 line card redundancy might log debug-level
tracebacks when the standby line card becomes ready for switchover.
Conditions: This occurs when there is too much information for a specific cable modem that
prevents it from synchronizing with the standby linecard.
Workaround: There is no workaround.
•
CSCsm55179
Symptoms: When the N+1 line card switchover happens to protect and revert to working, the
standby performance routing engine (PRE) switchover may reset with some configurations.
Conditions: This occurs when removing some DOCSIS Set-top Gateway (DSG) configuration after
the revert back, particularly when running the no cable dsg tg command. In the error case, the
standby PRE resets and the configuration is re-synchronized with the active PRE.
Workaround: There is no workaround. The standby PRE does not impact the current service.
•
CSCso21260
Symptoms: When configuring certain rfswitch snmp-community string as a redundancy suboption,
the CMTS does not automatically create the corresponding snmp-server community <password>
view hccp_chansw_snmp_view RW entry resulting in the line card switchover failure.
Workaround: There is no workaround.
•
CSCso34318
Symptoms: The Cisco uBR10012 router allows an SNMP community string length of 128 characters
but is truncated by the internal SNMP agent to 64 characters.
Conditions: This occurs any time an SNMP community string is entered in the CMTS.
Workaround: Use only 64 characters or less SNMP community string length.
•
CSCso59575
Symptoms: The cable modem termination system (CMTS) does not show an error message when the
RF switch name is longer than the defined value.
Conditions: This occurs when the length of the RF switch name is longer than the defined value. The
maximum length of an RF switch name is 30 characters. The RF switch name is truncated to 30
characters when it exceeds the defined value.
Workaround: The CMTS should display an error message and not add the RF switch name entry to
the running configuration.
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Caveat List for Cisco IOS Release 12.2(33)SCA
CSCso73405
Symptoms: Traceback observed on both route processors (RP) after N+1 switchover using cable
power off x/y command.
Conditions: This occurs when the standby route processor progresses to standby cold-config.
Workaround: There is no workaround.
•
CSCso74192
Symptoms: The show cable clock command wrongly displays the number of TCC cards in the
chassis.
Conditions: This occurs when new DTCC cards are inserted into slot 1/1 and 2/1 followed by a PRE2
switchover.
Workaround: Perform another PRE2 switchover.
•
CSCso76704
Symptoms: PER2 generates the following message when CLC is locked out.
F241-38-03-UBR10K-1#redundancy force-failover main-cpu
Proceed with switchover to standby PRE? [confirm]y
% HCCP 1 50 Switchover in progress. ====> switchover? I am doing lockout, not
switchover
HA system in transient state, switchover aborted.
Conditions: This occurs when one or more cable line cards (CLC) are locked out.
Workaround: Run the show hccp detail | i lockout command before PRE2 switchover.
•
CSCsq02262
Symptoms: IPC timeout does not trigger line card switchover.
Conditions: The sync-pulse failure was designed to trigger line card switchover but based on the
HCCP design, IPC timeout should trigger line card switchover.
Workaround: There is no workaround.
•
CSCsq19079
Symptoms: Inconsistent running-configuration between active and standby after route processor
switchover.
Conditions: This occurs with global N+1 configured and after a route processor switchover.
Workaround: There is no workaround.
CMTS-Wideband
•
CSCsi94641
Symptoms: Wideband modems associated with the first shared port adapter (SPA) do not display
wideband counters as expected for the downstream service flows.
Conditions: This occurs on a Cisco uBR10012 router running Cisco IOS Release 12.2SBU05. The
wideband modems associated with the first SPA in 1/0/0 bay have their downstream service flow
counters incremented as expected. But the wideband modems in 1/0/1 bay do not show incrementing
counters for their downstream service flows.
Workaround: There is no workaround.
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•
CSCsj97292
Symptoms: Under rare conditions, a Hot Standby Connection-to-Connection Protocol (HCCP)
switchover and revertback can cause all JIBs to shut down, the UP convertor to be disabled, and all
modems to drop. This issue is not necessarily a cable modem termination system (CMTS) problem;
sometimes it can be triggered by HCCP issues as well.
To diagnose this problem:
1.
Enter the show controller x/y/z command. Note that the output will display: “i Disable”.
2.
Enter the show hccp detail command. Note that the Member Loading output count is not 0.
Workaround: Recover the modems from offline status by performing the following steps:
1.
Remove the protect member.
2.
Remove the problematic working member.
3.
Normalize the new standalone card and get the modems back online. (Note that after the
modems are back online, the hccp count value will still be greater than 0 5.)
4.
Decide whether you want to add the working and protect members back.
5.
Schedule a maintenance window to recover the hccp Member Loading non 0 count 1.
Recover the hccp Member Loading non 0 count 1 by performing the following steps:
1.
Reset the secondary PRE to re-synchronize the database.
2.
Check that the secondary PRE is working.
3.
Perform a switchover to the PRE.
4.
Enter the show hccp detail command. The Member Loading output count should be 0 5.
5.
Perform the CLC switchover now to make sure HCCP works as designed. (This step assumes
that you have the line card already put back into the global HCCP configuration.)
Resolved Caveats — Cisco IOS Release 12.2(33)SCA1
The resolved caveats are grouped based on their component types.
CMTS-Application
•
CSCsl61201
Symptoms: CMTS generates duplicate IPDR records for same service identifier (SID). This creates
accounting issues for usage-based billing of cable modems.
Conditions: This occurs on Cisco uBR10012 platform running Cisco IOS Release 12.3(17b)BC4
when Subscriber Account Management Interface Specification (SAMIS) feature is used.
Workaround: There is no workaround.
•
CSCsl73391
Symptoms: CMTS sysUpTime parameter remains unchanged in IPDR document for all records thus
making it unreliable for stop records. Similarly, IPDRcreationTime parameters are the same for
interim records and are set to the data collection start time for the IPDR document. These may cause
certain accounting issues.
Conditions: This issue occurs when Subscriber Account Management Interface Specification
(SAMIS) feature is used.
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Workaround: Poll the DOCS-QOS-MIB object directly.
•
CSCsm50944
Symptoms: A high CPU value is observed when many host IP addresses of modems are registered
with static IP addresses.
Conditions: This is observed when some subinterfaces have cable source-verify command
configured and the other subinterfaces in the same bundle have cable source-verify dhcp command
configured.
Workaround: Configure the cable source-verify dhcp command on both the subinterfaces. For
static IP addresses, reserve these addresses in the DHCP server.
•
CSCsm51875
Symptoms: Leasequery-filter is not filtering the downstream packets for unknown SID.
Conditions: This occurs when no cable arp and cable source-verify dhcp commands are
configured under interface configuration mode, and the traffic is pumped from pagent with unknown
destination IP address.
Workaround: There is no workaround.
•
CSCsm51986
Symptoms: CMTS_UNFRAG_CONCAT_BURST_SIZE does not reflect the platform line card cap.
Conditions: This occurs when operators are increasing the upstream throughput rate and the CMTS
cable-default-phy burst is set to 0. When the maximum concat burst TLV is omitted, a maximum
concat burst size of 3044 is assumed by the cable modem. In this case, cmts admission control is
incorrectly using a fixed defined constant of 2000 as maximum burst size, and the flow is rejected.
Workaround: For MC28U/MC28UC/MC16U/MC16UXMC520T cards, the maximum burst size
should be 4000 and not 2000.
•
CSCsm55512
Symptoms: Tracebacks occur every time when INVALIDSIDPOSITION error is displayed in a
CMTS that has a large number of cable modems with a few going offline.
Workaround: There is no workaround.
•
CSCsm51875
Symptoms: When the show cable leasequery-filter command is executed, the downstream packets
for unknown service IDs (SID) are not filtered.
Conditions: This is observed when network traffic is generated with unknown destination IP
address.
Workaround: There is no workaround.
•
CSCso84029
Symptoms: Upsteam traffic is not controlled according to the the penalty enforce class in VXR.
Conditions: This occurs when a cable modem is penalized and associated with the penalty service
class. The upstream traffic is allowed to exceed the penalty class.
Workaround: There is no workaround.
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CMTS-DOCSIS
•
CSCsk16894
Symptoms: On a Cisco uBR10-MC5X20H line card, increasing upstream channel width causes
modems to increase transmit power, while decreasing the channel width causes modems to decrease
power transmit level.
Conditions: This occurs while the CMTS is reporting the same power received for the modems.
Workaround: Change the upstream receive power or change attenuation in combining.
•
CSCsm93847
Symptoms: When ATDMA is run for DOCSIS 2.0, the 1.x cable modems will be moved to a port
which can not be registered by these modems.
Workaround: Run tdma-atdma for all modems in the 3.2 MHz channel width.
•
CSCso45730
Symptoms: The cable load balancing (LB) group has a cluster of TDMA and ATDMA mode
channels. During static load balancing, the 1.x cable modem might be moved to the ATDMA channel
based on the load. This problem results in the 1.x cable modem taking a long time to come online.
Workaround:
•
•
Use the UCC or the DCC to move the 2.0 modems to ATDMA only channels.
•
Avoid configuring the mix capabilities of upstream channels in the same LB group.
CSCsk03915
Symptoms: The uBR10000 series router is not filtering some cable downstream packets. The issue
is observed for IPv4 packets. The packets are sent from CMTS to CM/CPE and the downstream
cable filters configured in the PRE2 of the router fails to filter it. However, it does not affect the
functionality of the router and the packets from external sources are filtered as expected.
Workaround: There is no workaround.
CMTS-Drivers
•
CSCsl42554
Symptoms: All the cable modems go offline with no alert or log message. When clear cable modem
all del command is executed, no cable modem is ranging. The upconverter signal is ok and the ucd
counter is also normal.
Conditions: As there is no log and other specific information, it is hard to get the root cause. This
occurs only in a Cisco uBR10-MC5X20H line card.
Workaround: Use cable downstream rf-shutdown and no cable downstream rf-shutdown
commands.
•
CSCso42653
Symptoms: During installation of a new chassis with the DTCC card, when modems are moved from
the old chassis to the new one, some of the modems do not come online and are stuck in the init(rc)
state.
Conditions: This occurs frequently with the Cisco uBR10-MC5X20U line card and less frequently
with the Cisco uBR10-MC5X20H line card when a new chassis with DTCC card is installed. No
equalization coeff packet is sent from the CMTS till the modem is online. But in Cisco IOS Release
12.3(21)BC, equalization coeff packet is seen just after the modem is connected.
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Workaround: Change the upstream modulation to Quadrature Phase-Shift Keying (QPSK)
modulation.
CMTS-Management
•
CSCso04521
Symptoms: Router crashes on running the test cable load-balance x.x.x ucc command.
Workaround: There is no workaround.
CMTS-Packetcable
•
CSCsd11861
Symptoms: Jitter and latency occurs in specific UGS upstream service flows that use LLQ
scheduling mode instead of the DOCSIS compliant scheduling mode.
Conditions: This is observed when the upstream LLQ scheduling mode is enabled.
Workaround: There is no workaround.
CMTS-Platform
•
CSCsk85933
Symptoms: A Cisco uBR10k running Cisco IOS Release 12.3(17b)BC3 may report Cable Modems
stuck in init(rc) state on certain Upstream Interfaces. Very high number of Input queue drops are
also observed under the corresponding Downstream interfaces.
Conditions: This problem has only been observed on a Cisco uBR10K router with Cisco
uBR10-MC5X20H-D card.
Workaround: Disable the PHS feature for voice calls (if enabled). To bring the affected cable
modems back online run the hw-module subslot x/y reset exec command for each of the affected
line cards.
•
CSCsl55949
Symptoms: A Parallel Express Forwarding (PXF) processor crash causes the PRE2 to crash as well.
The PRE2 crash follows due to the memory allocation error:
%SYS-3-OVERRUN: Block overrun at 1A91D098 (red zone 45BED810)
Conditions: This occurrence is found in Cisco IOS Release 12.3(17b)BC9 with the PXF enabled on
the ESR-PRE2.
Workaround: Disable the PXF processor.
•
CSCsl78770
Symptoms: The IPC between the cable line card and the SPA cannot be created when the SPA and
the cable line card start open port at the same time.
Workaround: Reset the cable linecard.
•
CSCsm52934
Symptoms: The previously disabled JIB upstream port becomes enabled after the Cisco 520 linecard
is reset.
Workaround: Run the shut/no shut cable interface command to correct the anomaly.
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CMTS-PXF
•
CSCsl72179
Symptoms: Issuing the shut and no shut command stream causes Parallel Express Forwarding
(PXF) crash resulting in the "TBB Length” error.
Conditions: This is rare and occurs when there is continuous traffic to the cable modems on the
interface to be shut down.
Workaround: There is no workaround.
CMTS-Redundancy
•
CSCso02189
Symptoms: CMTS crashes after linecard switchover and Parallel Express Forwarding (PXF) reload.
Conditions: This occurs with ToS based p2p MQC feature enabled, and while p2p traffic passes
through the CMTS after the linecard switchover, and the PXF reload using microcode reload pxf
command.
Workaround: There is no workaround.
•
CSCso08115
Symptoms: The HCCP sync-pulse logic can lead to unexpected resets and/or switchovers of working
linecards due to defective Protect line cards.
Workaround: There is no workaround.
•
CSCso38313
Symptoms: On a Cisco uBR10012 router, the active PRE2 crashes and failover to standby PRE
occurs when the Protect line card is in active state.
Conditions: This is observed on a Cisco uBR10012 router running Cisco IOS Release 12.3(17b)BC4
and configured for global N+1 linecard redundancy (HCCP). The PRE crash happens when the
protect linecard is in active state and the standby working linecard crashes due to a memory
allocation failure. HCCP goes into an abnormal state causing the active PRE to crash.
Workaround: There is no workaround.
•
CSCso61633
Symptoms: The Cisco uBR10012 router with PRE2 crashes at cmts_hccp_load_config.
Conditions: This is observed on the router running Cisco IOS Release 12.3(23)BC1.
Workaround: There is no workaround.
•
CSCso76808
Symptoms: Queues created on the standby PRE.
Conditions: This occurs when primary downstream service flows with non zero DOCSIS priority
synchronized to the standby PRE with priority set to zero. This results in queues on the standby PRE
prior to switchover with incorrect parameters.
Workaround: There is no workaround.
•
CSCso79280
Symptoms: A Cisco uBR10012 router with the Cisco UBR10-MC5X20 linecard may crash due to
excessive memory allocation failures with low memory errors.
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Conditions: This is observed on the router running Cisco IOS Release 12.3(21a)BC4 with
ESR-PRE2 module.
Workaround:
•
•
Perform the online insertion and removal (OIR) process on the linecard.
•
Reset the Hw-module subslot 5/1.
CSCso82323
Symptoms: PRE crashes.
Conditions: This occurs after a PRE switchover and running the no shut protect interface
command.
Workaround: There is no workaround.
•
CSCso86994
Symptoms: The standby PRE crashes at hccp_build_default_cmd_list.
Conditions: This occurs after a PRE switchover and running the no shut protect interface
command.
Workaround: There is no workaround.
CMTS-Wideband
•
CSCsl73926
Symptoms: On a wideband Shared Port Adapter (SPA), when one SFP module is disconnected the
other module does not connect as expected.
Conditions: This occurs with Cisco uBR10012, Wideband SPA running Cisco IOS Release
12.3(21a)BC4.
Workaround: There is no workaround.
•
CSCso42612
Symptoms: The ccwbWBCmStatusValue seems to be unresponsive on a Cisco uBR10012 router
with PRE2-RP engine.
Conditions: This occurs on a Cisco uBR10000 (PRE2-RP) running
ubr10k2-k8p6u2-mz.123-21a.BC4.bin image.
Workaround: There is no workaround.
IPv6
•
CSCso67850
Symptoms: The Cisco router might crash while pasting (cut and paste) a set of IPv6 configuration
commands for a router network interface to the router console.
Conditions: This occurs during router configuration.
Workaround: There is no workaround.
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Operating System
•
CSCsk74962
Symptoms: The Cisco router might experience spurious memory access error when running the
show buffer assigned dump command.
%ALIGN-3-SPURIOUS: Spurious memory access made at 0xXXXXXXXX reading 0xXX
%ALIGN-3-TRACE: -Traceback= XXXXXXXX XXXXXXXX XXXXXXXX
Workaround: There is no workaround. This is a cosmetic error and should not cause problems for
the router's operation.
PXF-Common
•
CSCso76323
Symptoms: Parallel Express Forwarding (PXF) bus limits maximum MTU on the Cisco uBR10012
routers to 9216 bytes and causes data packets to drop.
Conditions: This issue is observed on the router running Cisco IOS Release 12.3(17)BC onwards.
Workaround: There is no workaround.
vpdn
•
CSCso34413
Symptoms: Traceback is displayed when show vpdn sca command is used before the vpdn module
is enabled.
Workaround: Use the vpdn enable command before configuring other vpdn commands.
Open Caveats — Cisco IOS Release 12.2(33)SCA
The open caveats are grouped based on their component types.
CMTS-Application
•
CSCsm51875
Symptoms: The downstream packets for unknown service IDs (SID) are not filtered when running
the show cable leasequery-filter command.
Conditions: This is observed when network traffic is generated with unknown destination IP
address.
Workaround: There is no workaround.
CMTS-Management
•
CSCsm93324
Symptoms: The access-group keyword option is not provided when running the show cable modem
command.
Conditions: This issue is observed in Cisco IOS Release 12.2(33)SCA .
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Workaround: There is no workaround.
CMTS-PXF
•
CSCsl87061
Symptoms: The show cable modem verbose command does not display the accurate total DS
throughput value and the statistics display is delayed.
Conditions: This issue is observed when the command is run during unicast or multicast traffic
across the cable modems.
Workaround: The statistics will be displayed correctly after the commands subsequent to show
cable modem verbose command are executed.
•
CSCsl64383
Symptoms: In a Multiprotocol Label Switching (MPLS)-Virtual Private Network (VPN)
environment, the Toaster punts packets to Route Processor (RP) for source verification and thereby
impacting the performance.
Conditions: This behaviour is observed when the cable modem and the Customer Premises
Equipment (CPE) are in different VPN routing/ forwarding (VRF) tables and the source-verification
is enabled.
Workaround: There is no workaround.
CMTS-Redundancy
•
CSCsm50955
Symptoms: A Cisco uBR10012 router with N+1 linecard redundancy may result in debug level
tracebacks.
Conditions: This occurance is found when information associated with a specific cable modem
becomes too large and is prevented from being synchronized with the standby linecard.
Workaround: There is no workaround.
•
CSCsm55179
Symptoms: When the N+1 linecard switchover happens to protect and revert to working, the standby
Performance Routing Engine (PRE) switchover may reset with some configurations.
Workaround: There is no workaround for this issue since the standby PRE reset does not impact the
service.
CMTS-Wideband
•
CSCsi94641
Symptoms: Wideband modems that are associated with the first shared port adapter (SPA) do not
display wideband counters as expected for down stream service flows.
Workaround: There is no workaround.
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Miscellaneous
•
CSCsj02533
Symptoms: The Cisco uBR10012 router CPU usage reaches abnormally high value of 90% for less
than a minute when a large number of Border Gateway Protocol (BGP) routes flap.
Workaround: There is no workaround.
IP Multicast
•
CSCsk82435
Symptoms: A multicast route is removed unexpectedly when the RP PIM interface is shut down
during the IGMP static configuration.
Conditions: This issue is observed when the igmp static group is configured as the default route
interface.
Workaround: There is no workaround.
Resolved Caveats — Cisco IOS Release 12.2(33)SCA
There are no resolved caveats in Cisco IOS Release 12.2(33)SCA.
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