Cisco CRS Configuration Guide

Related Topics
IP LDP Fast Reroute Loop Free Alternate, on page 19
MPLS LDP CSC for Multiple VRFs Configuration: Examples
This figure shows a L3VPN LDP CSC topology that uses either BGP or LDP between PE and CE routers to
distribute routes and MPLS labels.
L3VPN CSC VPN: LDP / BGP
CE13 ---
\
CE12 --- PE1 ---------- PE2
// \ \
// \ \
// \ \
CE11 \ CE21
\ \ /
\ \ /
\ \ /
PE11 --------- PE22
VRF red: CE11, CE21
VRF blue: CE12, CE13 (local only switching)
Multi-home CEs: CE11, CE21
LDP CSC: PE1/PE11 with CE1x
BGP CSC: PE2/PE22 with CE2x
CSC-CE11 Configuration
hostname ce11
interface Loopback0
ipv4 address 11.11.11.11 255.255.255.255
!
interface POS0/2/0/0
ipv4 address 192.168.1.11 255.255.255.0
!
interface POS0/2/0/1
ipv4 address 192.168.2.11 255.255.255.0
!
interface POS0/2/0/2
ipv4 address 192.168.3.11 255.255.255.0
!
router ospf 100
log adjacency changes
router-id 11.11.11.11
area 0
interface Loopback0
!
interface POS0/2/0/0
!
interface POS0/2/0/1
!
interface POS0/2/0/2
!
!
!
mpls ldp
log
adjacency
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
88
Implementing MPLS Label Distribution Protocol
MPLS LDP CSC for Multiple VRFs Configuration: Examples

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