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:
Dec. 13, 2005
Filed:
Aug. 25, 2000
Dan Adamski, Nevcan, CA;
David Benson, Acton, MA (US);
Bilel Jamoussi, Nashua, NH (US);
Yunzhou LI, Lowell, MA (US);
Jagannath Shantigram, Cambridge, MA (US);
Dan Adamski, Nevcan, CA;
David Benson, Acton, MA (US);
Bilel Jamoussi, Nashua, NH (US);
Yunzhou Li, Lowell, MA (US);
Jagannath Shantigram, Cambridge, MA (US);
Nortel Networks Limited, , CA;
Abstract
In a router, externally received messages addressed to an active line card are bridged to a protection line card. Each line card in the router is programmed to respond to such externally received messages by directing them to the protection line card associated with the active line card as well as to the active line card. The protection line card is configured with inbound and outbound path tables that are the clones of the inbound and outbound path tables of its corresponding active line card. Bridging is accomplished by revising descriptors stored in a plurality of line cards to indicate an association between an active one of the line cards and its protection line card. Received messages are addressed using the revised descriptors to the active line card and also to its protection line card. Upon failure of an active line card, its physical interface can be disabled once its protection line card has clones of the inbound and outbound path tables and bridging has been set up.