Cisco CRS Configuration Manual page 247

Implementing MPLS Layer 3 VPNs
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 BGP configuration mode allowing you to configure the BGP routing process.
Step 3 bgp confederation peers peer autonomous-system-number
Example:
RP/0/RP0/CPU0:router(config-bgp)# bgp confederation peers 8
Configures the peer autonomous system number that belongs to the confederation.
Step 4 bgp confederation identifier autonomous-system-number
Example:
RP/0/RP0/CPU0:router(config-bgp)# bgp confederation identifier 5
Specifies the autonomous system number for the confederation ID.
Step 5
address-family vpnv4 unicast
Example:
RP/0/RP0/CPU0:router(config-bgp)# address-family vpnv4 unicast
RP/0/RP0/CPU0:router(config-bgp-af)#
Configures VPNv4 address family.
Step 6 neighbor ip-address
Example:
RP/0/RP0/CPU0:router(config-bgp-af)# neighbor 10.168.40.24
RP/0/RP0/CPU0:router(config-bgp-nbr)#
Places the router in neighbor configuration mode for BGP routing and configures the neighbor IP address 10.168.40.24
as a BGP peer.
Step 7
remote-as autonomous-system-number
Example:
RP/0/RP0/CPU0:router(config-bgp-nbr)# remote-as 2002
Providing VPN Connectivity Across Multiple Autonomous Systems with MPLS VPN Inter-AS with ASBRs Exchanging
Cisco IOS XR Virtual Private Network Configuration Guide for the Cisco CRS Router, Release 6.1.x
VPN-IPv4 Addresses
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