New and Changed Features in Cisco IOS XR Software, Release 5.3.x for
the Cisco CRS Router
New and changed features for Cisco IOS XR, Release 5.3.x 2
Features Added and Changed in Release 53x 2
Revised: September 11, 2015,
New and changed features for Cisco IOS XR, Release 5.3.x
The latest versions of Cisco IOS XR Software, Release 5.3.x documents are available at:
Cisco IOS XR Software Documents
Features Added and Changed in Release 53x
Table 1: New and Changed Features
Feature
Changed in Release
Where Documented
Routing Features
OSPF strict-mode support for BFD
Dampening
Release 5.3.2
OSPF FIB download notification
Release 5.3.2
RPL - if prefix is-best-path /
is-best-multipath
Release 5.3.2
Segment Routing OSPF and LDP
Interworking
Release 5.3.2
BGP Graceful Maintenance
Release 5.3.2
Per Neighbor TCP MSS
Release 5.3.2
• OSPF strict-mode for BFD
Dampening
• OSPF FIB download notification
• RPL best-path
• Segment Routing OSPF and LDP
Interworking
• BGP Graceful Maintenance
• Per Neighbor TCP MSS
CGN Features
NAT 64 on CGSE PLUS
Release 5.3.0
Port Preservation on CGSE PLUS for
NAT44
Release 5.3.1
Throughput Measurement on CGSE
PLUS
Release 5.3.1
2
• Stateful NAT64
• Port Preservation on CGSE Plus for
NAT44
• Throughput Measurement
Feature
Changed in Release
High Availability on CGSE PLUS
Release 5.3.1
Where Documented
• High Availability on the Data Path
Service Virtual Interface (SVI)
VPN Features
Virtual Circuit Connection Verification
Release 5.3.2
• LSP Ping over VPWS and VPLS
IP Addresses and Services Features
IPv6 Path MTU Discovery Support for
Applications Using Ping Protocol
Release 5.3.2
ARP Protection per Sub-Interface
Release 5.3.2
• Path MTU Discovery for IPv6
• Prerequisites for Implementing
EPFT
• Implementing EPFT
IPv6 Virtual Addresses
Release 5.3.1
ARP Protection per Sub-Interface
Release 5.3.1
—
Release 5.3.0
• IPv6 Virtual Addresses
• Implementing EPFT
—
MPLS Features
IPv6 Support in MPLS LDP
Release 5.3.1
IPv6 Support in MPLS LDP
Release 5.3.0
Delegation of PCC Initiated Tunnels
Release 5.3.0
• IPv6 Support in MPLS LDP
• IPv6 Support in MPLS LDP
• Delegation of PCC Initiated
Tunnels
Quality of Service Features
TCP Establishment DSCP Marking/ Set Release 5.3.2
IP Precedence/DSCP for NTP
In Configuring Modular QoS Service
Packet Classification section.
8 level Egress Priority
In Configuring Low-Latency Queueing
with Strict Priority Queueing
Release 5.3.2
3
Feature
Changed in Release
Where Documented
VPLS QoS (CRS)
Release 5.3.2
In Supported Capability Matrix and
VPLS and VPWS QoS: Example section.
-
Release 5.3.0
-
IP DSCP support for IPv6
Release 5.3.1
See Supported Capability Matrix section
in Configuring Modular QoS Service
Packet Classification chapter in Modular
Quality of Service Configuration Guide
.
Multicast Features
Multicast CAC
Release 5.3.0
• Configuring PIM Per Interface
States Limit
• Configuring IGMP Per Interface
States Limit
System Management Features
Overlapping Regular Expression
Release 5.3.2
• Flex Install
System Security Features
Network Configuration Protocol
Release 5.3
Network Configuration Protocol
Release 5.3.1
4
• The Network Configuration
Protocol
• Supported Yang Models
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