Method of operating a network

Details Method of operating a network Method of operating a network

2011-07-12

2011-07-12

Sol, Anthony (Department: 2465)

Multiplex communications

Diagnostic testing

Fault detection

C370S244000, C370S248000, C370S252000, C370S395310

Reexamination Certificate

active

07978615

ABSTRACT:
Techniques are provided for operating a network where router devices forward received data packets towards a destination node. Each router maintains a routing table, indicating the next hop to choose in respect of different ultimate destinations m accordance with a routing protocol. Periodic communications between neighboring routers are used as confirmation that they are still able to communicate with one another. Each router compares the time since it last communicated in this way with each of its neighbors with a router dead interval and determines that the respective neighboring router, or the currently designated route thereto, has gone down if the comparison indicates that the router dead interval has elapsed without such a communication having been received. Each router performs an adaptive algorithm to modify the or each corresponding router dead interval dynamically in accordance with one or more properties of the network as measured by the router.

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