Redundant routing capabilities for a network node cluster

H - Electricity – 04 – L

Patent

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H04L 12/56 (2006.01)

Patent

CA 2542645

Graceful/hitless restart features from a routing/signaling protocol may be utilized along with synchronization between cluster members in order to provide routing capabilities in a clustering environment. During normal operation, the active cluster member may operate the routing protocol(s) and communicate with the neighboring components using the cluster's address. As the active member learns the routes to the destinations, the routing data may be propagated to the stand-by cluster members across an internal communication mechanism. Configuration information for the routing component may also be propagated to the stand-by cluster members. Upon failure of the active routing component, the standby routing component may be started up such that neighboring routing components located outside of said cluster do not recalculate network topology based on said failure. This allows for failover to occur without affecting neighboring components and unduly burdening the system.

L'invention concerne la possibilité d'utiliser des fonctions de relance progressive/sans à coup depuis un protocole de routage/signalisation, simultanément avec la synchronisation entre éléments de groupe, pour établir les capacités de routage dans un environnement de groupage. En fonctionnement normal, l'élément de groupe actif peut lancer le ou les protocoles de routage et communiquer avec les composantes voisines en utilisant l'adresse du groupe. A mesure que l'élément actif prend connaissance des trajets vers les destinations, on peut diffuser les données de routage à destination des éléments de groupe de réserve via un mécanisme de communication interne. On peut aussi diffuser l'information de configuration pour la composante de routage à destination des éléments de groupe de réserve. En cas de défaillance de composante de routage active, la composante de routage de réserve peut être lancée de sorte que les composantes de routage actives situées en dehors du groupe considéré ne recalculent pas la topologie de réseau sur la base de la défaillance. Cela permet le déclenchement d'un basculement sans affecter les composantes voisines et d'éviter les surcharges exagérées du système.

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