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. 10, 2012
Filed:
Mar. 30, 2007
Chandrashekhar Appanna, Cupertino, CA (US);
Abhay Roy, Cupertino, CA (US);
Chandrashekhar Appanna, Cupertino, CA (US);
Abhay Roy, Cupertino, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A checkpointing approach enables BGP peers to reduce the number of UPDATE messages that are exchanged and processed after a router restarts and to pause and suspend BGP sessions when mobile nodes leave a BGP domain. In an embodiment, a router is configured for receiving a BGP pause message from a mobile node; suspending interaction with the mobile node using BGP, including suspension of expiration of BGP sessions for lack of keepalive messages; receiving a BGP resume message from the mobile node, wherein the resume message comprises a checkpoint marker that identifies a last route update that the mobile node received before the suspending; resuming interaction with the mobile node using BGP; and determining and sending to the mobile node all BGP routes that originated after the checkpoint marker.