Patent ID: 7602702
Filing Date: 2009-10-13
Classification: H04L

Abstract:
1. A method comprising: establishing, with a plurality of routing devices of a network, a point to multi-point (P2MP) label switched path (LSP) tunnel having a source and multiple destinations, wherein the P2MP LSP tunnel has a plurality of branch LSPs merged to form the P2MP LSP tunnel; establishing the P2MP LSP tunnel to include a bypass tunnel associated with at least one of the branch LSPs; receiving multicast traffic at the source of the P2MP LSP tunnel; forwarding copies of the multicast traffic from the source to each of the destinations via the P2MP LSP tunnel; forwarding at least a portion of the multicast traffic through the bypass tunnel; detecting a network event associated with at least one of the branch LSPs; and in response to the detected network event, rerouting the multicast traffic to flow through the bypass tunnel of the P2MP LSP, wherein rerouting the multicast traffic comprises: