Cisco CRS Configuration Guide

CONTENTS
Preface Preface xvii
Changes to This Document xvii
Obtaining Documentation and Submitting a Service Request xvii
CHAPTER 1 New and Changed Feature Information in Cisco IOS XR Release 5.1.x 1
New and Changed Feature Information in Cisco IOS XR Release 5.1.x 1
CHAPTER 2 Implementing MPLS Label Distribution Protocol 5
Prerequisites for Implementing Cisco MPLS LDP 6
Information About Implementing Cisco MPLS LDP 7
Overview of Label Distribution Protocol 7
Label Switched Paths 7
LDP Control Plane 7
Exchanging Label Bindings 8
LDP Forwarding 9
LDP Graceful Restart 11
Control Plane Failure 11
Phases in Graceful Restart 12
Recovery with Graceful-Restart 14
Label Advertisement Control (Outbound Filtering) 15
Label Acceptance Control (Inbound Filtering) 15
Local Label Allocation Control 16
Session Protection 16
IGP Synchronization 17
IGP Auto-configuration 18
IGP Synchronization Process Restart Delay 18
LDP Nonstop Routing 19
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
iii

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