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:
Oct. 04, 2011
Filed:
Jul. 28, 2006
Jeffrey C. Mogul, Menlo Park, CA (US);
Mallikarjun Chadalapaka, Roseville, CA (US);
Randolph B. Haagens, Roseville, CA (US);
Richard F. Wrenn, Colorado Springs, CO (US);
Richard J. Wagner, Vernonia, OR (US);
Jeffrey C. Mogul, Menlo Park, CA (US);
Mallikarjun Chadalapaka, Roseville, CA (US);
Randolph B. Haagens, Roseville, CA (US);
Richard F. Wrenn, Colorado Springs, CO (US);
Richard J. Wagner, Vernonia, OR (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A system and method for detecting path failure in a network are described. The system and method include a network interface which receives packets over particular connections, and an agent able to monitor the network interface and start a no-traffic timer for each particular connection when a packet is received on the connection. The agent is further able, when the no-traffic timer expires, to check for outgoing data on the particular connection, and compare a count of previously sent test packets against a limit. If the count is below the limit the agent sends a new test packet on the particular connection, the test packet provides an indication of the state of a network path associated with the particular connection. If the count is above the limit the agent initiates failover procedures for the associated path.