Patent ID: 7940647

Claim:
A method for implementing multicast fast reroute, comprising: determining, by a Point of Local Repair (PLR) on a primary Label Switched Path (LSP), a route for a backup LSP according to routing information of the primary LSP and information of a protection object to be protected by the backup LSP; and establishing the backup LSP according to the determined route for the backup LSP, wherein the determining the route for the backup LSP further comprises: determining, by the PLR, a set of destination nodes of downstream nodes of the PLR in the primary LSP according to the routing information of the primary LSP, determining the protection object to be protected by the backup LSP according to the information of the protection object, and determining the route for the backup LSP according to the set of destination nodes and the protection object, wherein the source node of the route for the backup LSP is the PLR and destination nodes of the route for the backup LSP are the set of destination nodes, and the route for the backup LSP bypasses the protection object.