Cisco CRS Configuration Guide

DETAILED STEPS
PurposeCommand or Action
Enters global configuration mode.configure
Example:
RP/0/RP0/CPU0:router# configure
Step 1
Enters MPLS-TE configuration mode.mpls traffic-eng
Example:
RP/0/RP0/CPU0:router(config)#mpls traffic-eng
Step 2
Moves FRR LSP traffic over the backup tunnel, when
LSP is soft-preempted.
soft-preemption frr-rewrite
Example:
RP/0/RP0/CPU0:router(config-mpls-te)#soft-preemption
frr-rewrite
Step 3
commit—Saves the configuration changes and remains
within the configuration session.
Use the commit or end command.
Step 4
end—Prompts user to take one of these actions:
• Yes— Saves configuration changes and exits the
configuration session.
• No—Exits the configuration session without
committing the configuration changes.
• Cancel—Remains in the configuration session,
without committing the configuration changes.
Enabling Auto-onehop Tunnels to Next-hop Neighbors
Perform these tasks to enable automatic creation of one-hop tunnels over MPLS traffic-engineering enabled
interfaces to nexthop neighbors. A router that becomes a next hop neighbor will have a set of one-hop tunnels
created automatically.
Before You Begin
The ipv4 unnumbered mpls traffic-eng Loopback Number configuration must be applied at the global
configuration level.
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
340
Implementing MPLS Traffic Engineering
Enabling Auto-onehop Tunnels to Next-hop Neighbors

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