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. 17, 2007
Filed:
Dec. 26, 2001
Applicants:
Scott S. Pegrum, Nepean, CA;
Matthew M. Yuen, Ottawa, CA;
Nabila Ould-brahim, Kanata, CA;
Inventors:
Assignee:
Nortel Networks Limited, St. Laurent, Quebec, CA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04L 12/28 (2006.01); H04L 1/00 (2006.01); H04L 12/26 (2006.01); G01R 31/08 (2006.01); G06F 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A high availability packet forwarding router for an internet protocol (IP) network, includes two control processors, one or more service termination cards (STCs) with forwarding information bases (FIBs), and a packet forwarding engine. The two processors run asynchronously in a master/standby relationship. Integrity of processes running on the control processors is monitored and the forwarding engine forwards packets according to a FIB maintained by an in-service one of the control processors. Hitless failover and hitless software upgrades are supported.