Patent ID: 7558219
Filing Date: 2009-07-07
Classification: H04L

Abstract:
1. A method comprising: establishing a multicast tree comprising a point-to-multipoint (P2MP) label switched path (LSP) forming a P2MP tunnel, the P2MP tunnel having a source device providing an ingress to the P2MP tunnel and a plurality of destination devices providing a plurality of different egresses from the P2MP tunnel, wherein each of the destination devices belongs to at least one virtual private local area network service (VPLS) multicast instance; and transmitting multicast data packets for the VPLS multicast instances from the source device through the P2MP tunnel to the destination devices on the multicast tree, wherein establishing the multicast tree comprises: wherein transmitting the multicast data packets from the source device comprises encapsulating each of the multicast data packets at the source device with an outer label and one of the inner labels, wherein the outer label identifies the label space within the destination device that corresponds to the multicast tree, and wherein the inner label is based on the VPLS multicast instance with which the multicast data packet is associated.