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:
Apr. 14, 2015
Filed:
Nov. 22, 2011
Peter Ashwood-smith, Hull, CA;
Guoli Yin, Nepean, CA;
Hong Zhang, Kanata, CA;
Nigel Bragg, Weston Colville, GB;
David Allan, Ottawa, CA;
Peter Ashwood-Smith, Hull, CA;
Guoli Yin, Nepean, CA;
Hong Zhang, Kanata, CA;
Nigel Bragg, Weston Colville, GB;
David Allan, Ottawa, CA;
RPX Clearinghouse LLC, San Francisco, CA (US);
Abstract
Forwarding state is installed for sparse multicast trees in a link state protocol controlled Ethernet network by enabling intermediate nodes to install state for one or more physical multicast trees, each of which may have multiple logical multicast trees mapped to it. By mapping multiple logical multicasts to a particular physical multicast, and installing state for the physical multicast, fewer FIB entries are required to implement the multiple multicasts. Mapping may be performed by destination nodes before advertising membership in the physical multicast, or may be performed by the intermediate nodes before installing state when a destination node advertises membership in a logical multicast. Intermediate nodes will install state for the physical multicast tree if they are on a shortest path between a source and at least one destination of one of the logical multicasts that has been mapped to the physical multicast.