Configuring The Route Reflectors To Exchange Vpn-Ipv4 Routes - Cisco CRS Configuration Manual

Providing VPN Connectivity Across Multiple Autonomous Systems with MPLS VPN Inter-AS with ASBRs Exchanging
IPv4 Routes and MPLS Labels
• Yes - Saves configuration changes and exits the configuration session.
• No - Exits the configuration session without committing the configuration changes.
• Cancel - Remains in the configuration mode, without committing the configuration changes.

Configuring the Route Reflectors to Exchange VPN-IPv4 Routes

Perform this task to enable the route reflectors to exchange VPN-IPv4 routes by using multihop. This task
specifies that the next-hop information and the VPN label are to be preserved across the autonomous system.
SUMMARY STEPS
1. configure
2. router bgp autonomous-system-number
3. neighbor ip-address
4. remote-as autonomous-system-number
5. ebgp-multihop [ttl-value]
6. update-source type interface-path-id
7. address-family vpnv4 unicast
8. route-policy route-policy-name in
9. route-policy route-policy-name out
10. next-hop-unchanged
11. 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 neighbor ip-address
Cisco IOS XR Virtual Private Network Configuration Guide for the Cisco CRS Router, Release 6.1.x
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Implementing MPLS Layer 3 VPNs