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:
May. 04, 2010
Filed:
Aug. 16, 2005
David D. Ward, Somerset, WI (US);
John Galen Scudder, Ann Arbor, MI (US);
Pranav Mehta, San Jose, CA (US);
David D. Ward, Somerset, WI (US);
John Galen Scudder, Ann Arbor, MI (US);
Pranav Mehta, San Jose, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A technique is provided for graceful restart of a Border Gateway Protocol (BGP) router that uses a local store on the restarting router that stores prefixes on all routes or the 'group best path' information on all BGP peers having a common Autonomous System (AS) number. This local store is used to run best path computations on the restarting router, rather than first awaiting receipt of route information from peers to speed the restart process. Updates are then transmitted to peers using the best path data and an end-of-Routing Information Base (RIB) message it transmitted by the restarting router to indicate that all information has now been sent by the restarting router. Thereafter the restarting router processes incoming updates from peers as received (or these peers routes are timed-out), remaining stale paths are deleted and any changed best paths, based upon the newly received updates, are then transmitted to peers.