Configuring inter-AS IPv6 VPN
If the MPLS backbone spans multiple ASs, you must configure inter-AS IPv6 VPN.
There are three inter-AS VPN solutions (for more information, see "Configuring MPLS L3VPN"). IPv6 MPLS L3VPN supports only inter-AS VPN option A and option C.
Before configuring inter-AS IPv6 VPN, perform these tasks:
Configure an IGP for the MPLS backbone in each AS to ensure IP connectivity.
Configure basic MPLS for the MPLS backbone of each AS.
Configure MPLS LDP for the MPLS backbones so that LDP LSPs can be established.
The following sections describe inter-AS IPv6 VPN option A and option C. Select one according to your network scenario.