Configure an IBGP Session between PE Routers

You must configure an IBGP session between PE routers to allow these routers to exchange information about Layer 2 VPNs, particularly information about sites connected to Layer 2 VPNs. The PE routers rely on this information to determine which labels to use for traffic destined for remote sites. To enable an IBGP session between the PE routers, include the family l2vpn statement when configuring IBGP in the master instance:

[edit protocols bgp]

bgp {

    group group-name {

        type internal;

        local-address ip-address; 

        family l2vpn {

            unicast;

        }

        neighbor ip-address;

    }

}

The family l2vpn statement indicates that the IBGP session is for the Layer 2 VPN.

The IP address in the local-address statement is the same as the address configured in the to statement at the [edit protocols mpls label-switched-path lsp-path-name] hierarchy level on the remote PE router. The IBGP session uses this address as the source in the peering session.

The IP address in the neighbor statement is the loopback address of the neighboring PE router. If you are using RSVP signaling, this IP address is the same address you specify in the to statement at the [edit mpls label-switched-path lsp-path-name] hierarchy level when you configure the MPLS LSP.