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:
Aug. 21, 2007
Filed:
Dec. 20, 2002
Linghsiao Wang, Irvine, CA (US);
Rong-feng Chang, Irvine, CA (US);
Eric Lin, Irvine, CA (US);
James Ching-shau Yik, Mission Viejo, CA (US);
Linghsiao Wang, Irvine, CA (US);
Rong-Feng Chang, Irvine, CA (US);
Eric Lin, Irvine, CA (US);
James Ching-Shau Yik, Mission Viejo, CA (US);
Conexant Systems, Inc., Red Bank, NJ (US);
Abstract
A method for actively detecting link failures on a high availability backplane architecture. The backplane system includes redundant node boards operatively communicating with redundant switch fabric boards. Uplink ports of the node boards are logically grouped into trunk ports at one end of the communication link with the switch fabric boards. A probe packet is sent, and a probing timer is set whenever either a specified number of bad packets are received, or an idle timer expires. If a response to the probe packet is received before the probe timer expires then the link is deemed valid, otherwise the link is presumed to have failed. Preferably, either the node boards or the switch fabric boards are configured to properly handle a probe pack, which preferably has identical source and destination addresses.