Cisco CRS Configuration Manual page 221

Implementing MPLS Layer 3 VPNs
Places the router in VRF neighbor configuration mode for BGP routing and configures the neighbor IP address
172.168.40.24 as a BGP peer.
Step 12 remote-as autonomous-system-number
Example:
RP/0/RP0/CPU0:router(config-bgp-vrf-nbr)# remote-as 2002
Creates a neighbor and assigns it a remote autonomous system number.
Step 13 password { clear | encrypted } password
Example:
RP/0/RP0/CPU0:router(config-bgp-vrf-nbr)# password clear pswd123
Configures neighbor 172.168.40.24 to use MD5 authentication with the password pswd123.
Step 14 ebgp-multihop [ ttl-value ]
Example:
RP/0/RP0/CPU0:router(config-bgp-vrf-nbr)# ebgp-multihop
Allows a BGP connection to neighbor 172.168.40.24.
Step 15
address-family ipv4 unicast
Example:
RP/0/RP0/CPU0:router(config-bgp-vrf-nbr)# address-family ipv4 unicast
Enters VRF neighbor address family configuration mode for BGP routing.
Step 16 allowas-in [as-occurrence-number ]
Example:
RP/0/RP0/CPU0:router(config-bgp-vrf-nbr-af)# allowas-in 3
Replaces the neighbor autonomous system number (ASN) with the PE ASN in the AS path three times.
Step 17 route-policy route-policy-name in
Example:
RP/0/RP0/CPU0:router(config-bgp-vrf-nbr-af)# route-policy In-Ipv4 in
Applies the In-Ipv4 policy to inbound IPv4 unicast routes.
Step 18
route-policy route-policy-name out
Example:
RP/0/RP0/CPU0:router(config-bgp-vrf-nbr-af)# route-policy In-Ipv4 in
Cisco IOS XR Virtual Private Network Configuration Guide for the Cisco CRS Router, Release 6.1.x
Connecting MPLS VPN Customers
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