Patent ID: 9154370
Filing Date: 2015-10-06
Classification: H04L

Abstract:
1. A method, comprising: encapsulating and transmitting an original packet toward a destination in a computer network, wherein the original packet is encapsulated with a tunnel header indicating a first source route toward the destination and a hop limit count related to a number of tunnel hops in the first source route and the original packet has an adjusted hop limit count set to an original hop limit count of the original packet less the hop limit count of the tunnel header; receiving a destination unreachable message originated by a particular node along the first source route, the destination unreachable message carrying the encapsulated packet as received by the particular node, wherein the particular node operates in a non-storing mode in which the particular node does not store a routing path to the destination; determining a failed link along the first source route based on the tunnel header and the particular node; determining an alternate source route to the destination without the failed link; and re-encapsulating and re-transmitting the original packet on an alternate source route, wherein the original packet is re-encapsulated with a new tunnel header indicating the alternate source route.