Hi, Sham links are used when there exists a backup link between the client sites apart from MPLS VPN connectivity. By default any route learned by backup link (again it should be in the same area like both site should be in area 1 etc.), will be intra-area and same route learned via MPLS VPN will be inter-area. To avaid this situation you must implement sham-link. Now the route learned by both via backup link and via MPLS VPN will be intra-area routes. Now u can play with metric to find the desired path / route.
By default MPLS VPN backbone is superbackbone, and is considered as area 0. Regards Vikas Sharma Hi, are there any recommendations for what method to use in a MPLS VPN with OSPF to avoid the interarea over intra-area routing problem with OSPF interconnected VPN Sites : Sham-Links or Area 0 ? Cheers Anton _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
