Patent ID: 7940776
Filing Date: 2011-05-10
Classification: H04L

Abstract:
1. A method comprising: sending, from a local router over a direct link between the local router and a first neighbor router, an adjacency discovery message that includes a repair address that indicates the local router but that is not advertised as reachable over the direct link; sending, from the local router to a different second neighbor router, an outbound routing update message that includes reachability data that indicates the repair address is reachable; forwarding a payload of an inbound tunneled data packet, that is received at the local router and directed to the repair address, based on a destination indicated in the payload; determining for an interface on the local router a direct address that is unique among routers in a network and a repair address that is unique among interfaces in the network; receiving an incoming routing update message that includes: determining whether the particular repair address is reachable from the local router, wherein if it is determined that the particular repair address is not reachable, then a data packet is encapsulated and directed to the particular address in an outbound tunneled data packet directed to the first neighbor repair address.