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:
Jul. 17, 2012
Filed:
Apr. 18, 2008
David Allan, Ottawa, CA;
Malcolm Betts, Kanata, CA;
Nigel Bragg, Weston Colville, GB;
Peter Ashwood Smith, Gatineau, CA;
Paul Unbehagen, Apex, NC (US);
David Allan, Ottawa, CA;
Malcolm Betts, Kanata, CA;
Nigel Bragg, Weston Colville, GB;
Peter Ashwood Smith, Gatineau, CA;
Paul Unbehagen, Apex, NC (US);
Rockstar Bidco LP, New York, NY (US);
Abstract
Multicast capabilities of a link state protocol controlled network are used to accelerate the flooding advertisement of topology change notifications within portions of the network. This flooding mechanism may be particularly efficient in a network with a large number of two-connected nodes such as a ring network architecture. A control plane specific multicast group address is used when flooding topology change notifications, and a process such as reverse path forwarding check is used as an additional control on forwarding of the notification to prevent looping of control plane packets. Two-connected nodes insert a forwarding entry into their FIB to enable frames containing the control message to be forwarded via the data plane on to the downstream node so that propagation of the control message along a chain of two-connected nodes may occur at data plane speeds.