US Patent Issued to Cisco Technology on June 28 for "System and Method for Multicasting in an Internet Protocol Virtual Private Network Environment" (California, North Carolina Inventors)

ALEXANDRIA, Va., July 2 -- United States Patent no. 7,969,981, issued on June 28, was assigned to Cisco Technology Inc. (San Jose, Calif.).

"System and Method for Multicasting in an Internet Protocol Virtual Private Network Environment" was invented by Rajiv Asati (Morrisville, N.

C.), Yiqun Cai (Cupertino, Calif.) and Mohamed Khalid (Cary, N.

C.).

According to the abstract released by the U.

S. Patent & Trademark Office: "A method is provided in one example implementation and includes sending a PIM join message to the second spoke router by the hub router. The second spoke router dynamically determines each interested remote spoke router by parsing a hub-sent PIM message and accordingly constructs the multicast routing entry such that the first and second spoke routers establish multicast communication independent of a hub router. In more specific embodiments, the PIM join/prune messaging includes a list of each downstream spoke router that sent a PIM join/prune, in a new attribute. The PIM join/prune message is sent by the hub router towards a multicast source. A new receiver-list attribute is created that the hub router populates with a non-broadcast multi-access (NBMA) address for each interested spoke router."

The patent was filed on Sept. 2, 2008, under Application No. 12/202,454.

For further information please visit: http://patft.uspto.gov/netacgi/nph-Parser?

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