Cisco CRS Configuration Manual page 234

Providing VPN Connectivity Across Multiple Autonomous Systems with MPLS VPN Inter-AS with ASBRs Exchanging
IPv4 Routes and MPLS Labels
SUMMARY STEPS
1. configure
2. router bgp autonomous-system-number
3. address-family ipv4 unicast
4. allocate-label all
5. neighbor ip-address
6. remote-as autonomous-system-number
7. address-family ipv4 labeled-unicast
8. route-policy route-policy-name in
9. route-policy route-policy-name out
10. Use the commit or end command.
DETAILED STEPS
Step 1 configure
Example:
RP/0/RP0/CPU0:router# configure
Enters Global Configuration mode.
Step 2 router bgp autonomous-system-number
Example:
RP/0/RP0/CPU0:router(config)# router bgp 120
RP/0/RP0/CPU0:router(config-bgp)#
Enters Border Gateway Protocol (BGP) configuration mode allowing you to configure the BGP routing process.
Step 3
address-family ipv4 unicast
Example:
RP/0/RP0/CPU0:router(config-bgp)# address-family ipv4 unicast
RP/0/RP0/CPU0:router(config-bgp-af)#
Enters global address family configuration mode for the IPv4 unicast address family.
Step 4
allocate-label all
Example:
RP/0/CPU0:router(config-bgp-af)# allocate-label all
Allocates the MPLS labels for a specific IPv4 unicast or VPN routing and forwarding (VRF) IPv4 unicast routes so that
the BGP router can send labels with BGP routes to a neighboring router that is configured for a labeled-unicast session.
Step 5 neighbor ip-address
Cisco IOS XR Virtual Private Network Configuration Guide for the Cisco CRS Router, Release 6.1.x
220
Implementing MPLS Layer 3 VPNs