Establishing MP-IBGP Peer Relationships Between PE Devices
Procedure
- Run system-view
The system view is displayed.
- Run bgp { as-number-plain | as-number-dot }
The BGP view is displayed.
- Run peer ipv4-address as-number as-number
The peer PE is configured as a BGP peer.
- Run peer ipv4-address connect-interface loopback interface-number
An interface is used to set up a Transmission Control Protocol (TCP) connection with the BGP peer.
A PE must use a loopback interface address with a 32-bit mask to set up an MP-IBGP peer relationship with the peer PE so that VPN routes can be iterated to tunnels. The route to the local loopback interface is advertised to the peer PE using an IGP on the MPLS backbone network.
- Run ipv4-family vpnv4 [ unicast ]
The BGP-VPNv4 address family view is displayed.
- Run peer ipv4-address enable
The ability to exchange VPN IPv4 routes with the BGP peer is enabled.
Related Tasks
When a large number of PE devices on the backbone network need to establish MP-IBGP peer relationships to exchange VPN routes, configure a route reflector (RR) to reduce the number of MP-IBGP connections between PE devices. The PE devices only need to establish MP-IBGP peer relationships with the RR. For detailed configuration, see Configuring Route Reflection to Optimize the VPN Backbone Layer.