Method for protection switching

Details Method for protection switching Method for protection switching

H - Electricity

04

L

H04L 12/437 (2006.01) H04L 12/24 (2006.01) H04L 12/46 (2006.01)

Patent

CA 2608706

The invention relates to a method for protection switching in a data network network including at least two rings (ERA, ERB) with a shared span (SP2,3) and a plurality of nodes (1- 4). Each ring (ERA, ERB) has an associated ring manager (RMA, RMB) for checking its associated ring (ERA, ERB) and the ring managers (RMA, RMB) have dedicated different priorities (PR1, PR2). When a failure (interruption) occurs in a shared span, a shared span node (2, 3) sends a failure message (FSP2,3) to a ring manager (RMB) of higher priority (PR1) of an associated ring (ERB), and the ring manager (ERB) unblocks its port (PB2) while the ring manager (RMA) of lower priority (PR1) maintains its port (PA2) blocked.

L'invention concerne un procédé de commutation de protection dans un réseau de données comprenant au moins deux anneaux (ERA, ERB) avec une plage partagée (SP2,3) et plusieurs noeuds (1- 4). Chaque anneau (ERA, ERB) possède un gestionnaire d'anneau associé (RMA, RMB) destiné à vérifier l'anneau qui lui est associé (ERA, ERB) et ces gestionnaires d'anneau (RMA, RMB) possèdent diverses priorités spécialisées (PR1, PR2). Lorsqu'une défaillance (interruption) intervient dans une plage partagée, un noeud de plage partagée (2, 3) envoie un message de défaillance (FSP2,3) à un gestionnaire d'anneau (RMB) de priorité supérieure (PR1) d'un anneau associé (ERB), et ce gestionnaire d'anneau (ERB) débloque son port (PB2) alors que le gestionnaire d'anneau (RMA) de priorité inférieure (PR1) maintient son port (PA2) bloqué.

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