Patent ID: 7567506

Claim:
A method of managing malfunctions in a telecommunications network, in a router that has a plurality of communication interfaces with said network, and a nominal operational routing plan duplicated on the interfaces, wherein the method comprises, during nominal operation: a step of calculating at least one secondary operational routing plan for degraded modes of operation of the network; and a step of transferring secondary plans to the interfaces; these steps being performed prior to detecting a malfunction that creates conditions for a degraded mode of operation, wherein, on detecting a malfunction in the network, a step is provided for switching the interfaces from the nominal plan to a secondary plan corresponding to the degraded mode of operation that results from the detected malfunction, wherein said step of switching the interfaces comprises: a substep of selecting a secondary operational routing plan corresponding to a degraded mode of operation that results from a detected malfunction; and a substep of transmitting synchronization information to cause said interfaces to switch simultaneously to said selected secondary plan, wherein said substep of transmitting synchronization information comprises transmitting information identifying said selected secondary operational routing plan, and a switchover command.