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:
Sep. 13, 2011
Filed:
Oct. 15, 2008
Mingqi Deng, Mountain View, CA (US);
Samuel G. Henderson, Raleigh, NC (US);
Vinaychandra Shankarkumar, Morrisville, NC (US);
Mingqi Deng, Mountain View, CA (US);
Samuel G. Henderson, Raleigh, NC (US);
Vinaychandra Shankarkumar, Morrisville, NC (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
An apparatus is provided in one example embodiment and it includes a first node coupled to an active endpoint and a standby endpoint. The first node communicates with a second node. When the active endpoint experiences a failure, the standby endpoint is activated such that a communication involving the second node continues. The standby endpoint communicates a complete window's worth of packets to the second node after the failure, the window's worth of packets including a last known sequence number acknowledged by the second node. In more specific embodiments, the first node is an L2TP network server (LNS) and the second node is an L2TP access concentrator (LAC). The last known sequence number was check pointed by the active endpoint to the standby endpoint.