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. 26, 2006
Filed:
Oct. 18, 2002
Bruno Mongazon-cazavet, Michel-sur-Orge, FR;
Jean-pierre Rombeaut, Maubeuge, FR;
Bruno Mongazon-Cazavet, Michel-sur-Orge, FR;
Jean-Pierre Rombeaut, Maubeuge, FR;
Alcatel, Paris, FR;
Abstract
The invention provides a high availability control method for a router in an autonomous system, the router being in communication with other routers using an IS—IS protocol via interfaces and presenting both an active IS—IS protocol engine and a standby IS—IS protocol engine. The method comprises steps of storing data concerning adjacency, the state of links, and interfaces in a memory of the active protocol engine, updating the data stored in a memory of the standby protocol engine, and activating the standby protocol engine using the updated data. The invention also provides a router implementing the method. The invention serves to increase router availability in the event of a failure or of maintenance actions.