The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 2014
Filed:
Sep. 28, 2011
Rama S. Appalla, Nashua, NH (US);
Gautam Khera, Walpole, MA (US);
Julie Mcgray, North Andover, MA (US);
Rama S. Appalla, Nashua, NH (US);
Gautam Khera, Walpole, MA (US);
Julie McGray, North Andover, MA (US);
Avaya Inc., Basking Ridge, NJ (US);
Abstract
Techniques disclosed herein include systems and methods that extend Protocol Independent Multicast (PIM) protocols to Shortest Path Bridging (SPB) technology. This includes connecting an IP multicast domain across an SPB network. SPB edge routers, also known as Backbone Edge Bridges, form virtual adjacencies with each other. As such, SPB edge routers maintain such PIM adjacency without sending Hello messages. Backbone Edge Bridges (BEBs) are discovered using null Intermediate System To Intermediate System (IS-IS) Internet Protocol Multicast (IPMC) type-length-value (TLV) control messages. Each PIM-enabled BEB records other PIM-enabled BEBs as an adjacent PIM-router in response to receiving a NULL IPMC TLV from those BEBs. Accordingly, PIM-enabled BEBs form a full mesh virtual adjacency between each other and can thereby encapsulate PIM control messages sent and received between two access networks connected to the SPB network.