New and Changed features for Cisco IOS XR
Software Release 5.1.x
This list summarizes the new and changed features for Cisco IOS XR Software Release 5.1.x.
To read additional information about Cisco IOS XR Software, Release 5.1.x features, see the Release Notes:
Release Notes
The latest versions of Cisco IOS XR Software, Release 5.1.x documents are available at:
Cisco IOS XR Software Documents
Configuration Guides
Command References
• New and Changed Information for Release 5.1.x, page 1
New and Changed Information for Release 5.1.x
Table 1: New and Changed Features for Cisco ASR 9000 Series Router:
Feature
Changed in Release
Where Documented
Routing Features
BFD Dampening
Release 5.1
BFD over IRB
Release 5.1
EIGRP Multi-Instance
Release 5.1
Graceful Restart for OSPFv3
Release 5.1
• BFD Dampening
• BFD over IRB
• EIGRP Multi-Instance
• Graceful Restart for OSPFv3
New and Changed Features in Cisco IOS XR Software, Release 5.1.x for Cisco ASR 9000 Series Aggregation Services
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New and Changed features for Cisco IOS XR Software Release 5.1.x
New and Changed Information for Release 5.1.x
Feature
Changed in Release
OSPFv3 Sham Link Support for MPLS
VPN
Release 5.1
Resilient Per-CE Label Allocation Mode
Release 5.1
Where Documented
• OSPFv3 Sham Link Support for
MPLS VPN
• Resilient Per-CE Label Allocation
Mode
• Configuring Resilient Per-CE Label
Allocation Mode Under VRF Address
Family
• Configuring Resilient Per-CE Label
Allocation Mode Using a
Route-Policy
• Configuring Resilient Per-CE Label
Allocation Mode Under VRF Address
Family: Example
• Configuring Resilient Per-CE Label
Allocation Mode Using a
Route-Policy: Example
User Defined Martian Check
Release 5.1
• User Defined Martian Check
Interface and Hardware Component
Features
Ethernet Data Plane Loopback
Release 5.1
• Ethernet Data Plane Loopback
• Configuring Ethernet Data Plane
Loopback
• Configuration Examples for Ethernet
Data Plane Loopback
Sampled Traffic Mirroring
Release 5.1
• Sampled Traffic Mirroring
• Restrictions of Sampled Traffic
Mirroring
• Sampled Traffic Mirroring: Example
Broadband Network Gateway Features
DHCPv4 Server
Release 5.1
• Enabling DHCP Server
• Configuring DHCPv4 Server Profile
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New and Changed features for Cisco IOS XR Software Release 5.1.x
New and Changed Information for Release 5.1.x
Feature
Changed in Release
Traffic Mirroring (SPAN) on subscriber
session
Release 5.1
Where Documented
• Traffic Mirroring on Subscriber
Session
• Enabling Traffic Mirroring on
Subscriber Session
Routing Support on Subscriber Sessions
Release 5.1
Idle Timeout for IPoE and PPPoE Sessions Release 5.1
• Routing Support on Subscriber
Sessions
• Idle Timeout for IPoE and PPPoE
Sessions
• Control Policy Events
• RADIUS Vendor-Specific Attributes
L2VPN and Ethernet Services Features
Virtual Private LAN Services Label
Switched Multicast
Release 5.1
• Virtual Private LAN Services Label
Switched Multicast
• Configuring VPLS LSM
• Configuring VPLS LSM: Examples
Per-VLAN Rapid Spanning Tree
Release 5.1
• Per-VLAN Rapid Spanning Tree
MPLS Layer3 VPN Features
No new features.
IP Addresses and Services Features
IPV6 ABF Object Tracking
Release 5.1
• Configuring Pure ACL-Based
Forwarding for IPv6 ACL
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New and Changed features for Cisco IOS XR Software Release 5.1.x
New and Changed Information for Release 5.1.x
Feature
Changed in Release
DHCPV4 Server Support
Release 5.1
Where Documented
• Configuring DHCPv4 Server Profile
• Configuring multiple classes with a
pool
• Configuring a server profile DAPS
with class match option
• Configuring Server Profile without
daps pool match option
• Configuring an address pool for each
ISP on DAPS
IPv6 - ND enhancement
Release 5.1
Refer Access List Commandschapter in
Cisco ASR 9000 Series Aggregation
Services Router IP Addresses and Services
Command Reference for information on
the commands used for configuring IPv6 ND enhancement.
MPLS Features
P2MP-TE Auto-tunnels
Release 5.1
MPLS over IRB
Release 5.1
Set DF Bit
Release 5.1
• P2MP-TE Auto-tunnels
• MPLS over IRB
• Set DF Bit
Quality of Service Features
Support for 16 Queues
Release 5.1
• Support for 16 Queues
CGv6 Features
No new features.
Release 5.1
NA
Release 5.1
NA
Multicast Features
No new features.
System Management Features
4arg
Release 5.1
• 4arg
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New and Changed features for Cisco IOS XR Software Release 5.1.x
New and Changed Information for Release 5.1.x
Feature
Changed in Release
SNMP updates
Release 5.1
Where Documented
• Session MIB support on subscriber
sessions
System Monitoring Features
No new features.
Release 5.1
NA
Release 5.1
NA
Release 5.1
NA
Release 5.1
Implementing Traffic Storm Control under
a VPLS bridge chapter Refer Traffic Storm
Control commands in Cisco ASR 9000
Series Aggregation Services Router System
Security Command Reference
ROM Monitor Features
No new features in this release
Netflow Features
No new features in this release
System Security Features
Storm Control Actions and BW based
policing
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New and Changed features for Cisco IOS XR Software Release 5.1.x
New and Changed Information for Release 5.1.x
New and Changed Features in Cisco IOS XR Software, Release 5.1.x for Cisco ASR 9000 Series Aggregation
Services Router
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