Cisco CRS Configuration Guide

ModificationRelease
Support was added for Unequal Load Balancing, IS-IS IP Fast
Reroute Loop-free Alternative routing functionality, and Path
Computation Element (PCE).
Release 3.5.0
No modification.Release 3.6.0
Support was added for the following features:
•
Ignore Intermediate System-to-Intermediate System (IS-IS)
overload bit setting in MPLS-TE.
•
MPLS-TE/Fast Reroute (FRR) over Virtual Local Area
Network (VLAN) interfaces.
Release 3.7.0
Support was added for the following features:
•
MPLS-TE Automatic Bandwidth.
•
SRLG (Shared Risk Link Groups).
•
Policy Based Tunnel Selection (PBTS) IPv6 that includes
the Interior Gateway Protocol (IGP) default path.
Release 3.8.0
The Point-to-Multipoint TE feature was added.Release 3.9.0
Support was added for the following features:
•
AutoTunnel Backup
•
SRLG (Shared Risk Link Groups)
Release 4.0.0
Support was added for the following features:
•
Ignore Intermediate System-to-Intermediate System
Overload Bit Setting in MPLS-TE
Release 4.1.0
The Auto-Tunnel Mesh feature was added.Release 4.1.1
Support was added for the following features:
•
Soft-Preemption
•
Path Option Attributes
Release 4.2.0
The Auto-Tunnel Attribute-set feature was added for auto-backup
tunnels.
Release 4.2.1
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
164
Implementing MPLS Traffic Engineering

Cisco CRS Specifications

General

Operating System	Cisco IOS XR
Product Type	Core Router
Form Factor	Modular Chassis
Dimensions	Varies by chassis type
Weight	Varies by chassis type
Architecture	Distributed
Switch Fabric	Multi-stage
Interface Support	Ethernet, SONET/SDH, OTN
Interfaces/Ports	Varies by line card
Port Density	Varies by line card
Routing Protocol	BGP, IS-IS, OSPF, MPLS
Management	CLI, SNMP
Power Supply	Redundant, hot-swappable
Cooling	Redundant, Hot-swappable Fan Trays
Supported Protocols	IPv4, IPv6, MPLS
Management Interfaces	Ethernet, console
Security Features	ACLs