Patent ID: 7801136
Filing Date: 2010-09-21
Classification: H04L

Abstract:
1. A computer implemented method performed in a first node for multi-casting a packet, the method comprising: receiving a first packet having a label stack including a plurality of labels compatible with MPLS (multi-protocol label switching), wherein the label stack is formed in a hierarchical structure based on levels of the label stack, including arranging substantially all nodes involved in a plurality of label switch paths (LSPs) into an array according to the hierarchical structure, from root to bottom and from left to right, and duplicating by a processor the first packet into a second packet as a function of contents of a topmost label of the label stack; forming by the processor a third packet by removing at least two labels from the top of the label stack of the second packet; and transmitting by the processor the first and third packets to different destination nodes as a function of respective contents of the topmost labels of the first and third packets.