Establishing an MP-EBGP Peer Relationship Between PEs

By introducing extended community attributes into BGP, MP-IBGP can advertise VPNv4 routes between PEs. PEs of different ASs are generally not directly connected. To set up an EBGP connection between the PEs of different ASs, you must configure the permitted maximum number of hops between PEs.

Procedure

Run system-view
The system view is displayed.
Run bgp as-number
The BGP view is displayed.
Run peer ipv4-address as-number as-number
The remote PE is specified as the EBGP peer.
Run peer ipv4-address connect-interface loopback interface-number
The source interface that sends BGP packets is specified.
Run peer ipv4-address ebgp-max-hop [ hop-count ]
The maximum number of hops permitted to establish the EBGP peer relationship is specified.
Run ipv4-family vpnv4
The BGP-VPNv4 address family view is displayed.
Run peer ipv4-address enable
The function to exchange VPNv4 routes with the remote PE is enabled.
Run commit
The configuration is committed.