Method for reducing fault detection time in a...

Details Method for reducing fault detection time in a... Method for reducing fault detection time in a...

2005-12-23

2011-12-27

Tran, Phuc (Department: 2471)

Multiplex communications

Fault recovery

C370S242000

Reexamination Certificate

active

08085654

ABSTRACT:
A method for reducing fault detection time in a network includes routers configured to exchange messages via at least one switch to check mutual reachability, each message including a list of routers reachable from the sending router. The method includes snooping, by the switch, a message from a router to extract the list of routers reachable from the router; and, when a network fault occurs that prevents the router from being reachable via the switch, sending, by the switch and to all the other routers connected to the switch, a network fault message including an empty list of routers, so that the receiving routers, not seeing their own identifier in the list, declare the adjacency with the sending router closed, and proceed to reroute traffic on a new route.

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Retana, A. et al., “MultiAcess Reachability Protocol (MARP),” Cisco Systems, Inc., Network Working Group, Internet Draft, pp. 1-13, (Mar. 2003).

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