Technique for avoiding IP lookup with...

Details Technique for avoiding IP lookup with... Technique for avoiding IP lookup with...

2006-08-04

2011-11-22

Ryman, Daniel J (Department: 2466)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S395500, C370S395530, C370S390000

Reexamination Certificate

active

08064440

ABSTRACT:
A technique avoids Internet Protocol (IP) lookup with Multipoint-to-Multipoint (MP2MP) Label Switched Paths (LSPs) in a computer network. According to the novel technique, end nodes of an MP2MP LSP determine a root node of the MP2MP LSP for a particular IP stream, e.g., based on a rendezvous point (RP) of the IP stream. The root node of the MP2MP LSP allocates an inner-label for the particular IP stream, and informs each of the end nodes of the inner-label for that stream. When any one of the end nodes thereafter sources traffic for the particular IP stream, the sourced traffic contains the allocated inner-label for the stream. Upon receiving the traffic for the particular IP stream, an end node may determine the IP stream to which the received traffic belongs based on the MP2MP LSP (e.g., indicated by an outer-label) and the inner-label, i.e., without performing an IP lookup operation.

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