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

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

High Availability on CGSE PLUS

Release 5.3.1

VPN Features

Virtual Circuit Connection Verification

Release 5.3.2

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

IPv6 Virtual Addresses

Release 5.3.1

ARP Protection per Sub-Interface

Release 5.3.1

Release 5.3.0

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

Quality of Service Features

TCP Establishment DSCP Marking/ Set IP Precedence/DSCP for NTP

Release 5.3.2

In Configuring Modular QoS Service Packet Classification section.

8 level Egress Priority

Release 5.3.2

In Configuring Low-Latency Queueing with Strict Priority Queueing

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

System Management Features

Overlapping Regular Expression

Release 5.3.2

System Security Features

Network Configuration Protocol

Release 5.3

Network Configuration Protocol

Release 5.3.1