Recovery of traffic in a connection-oriented network

摘要

A connection-oriented network (5) has a plurality of connections terminated at a first node (N6). A recovery group (A) is configured at the first node (N6) comprising at least two of the plurality of connections (LSP1-6, LSP2-6, LSP3-6, LSP4-6). Fault detection is performed over each of the connections in the recovery group (A) and the node determines if at least one recovery group fault condition is met, based on the results of the fault detections performed over the connections in the recovery-group (A). When the at least one recovery group fault condition is met, the node causes traffic on the plurality of connections in the recovery group (A) to be transferred to backup paths. When the at least one recovery group fault condition is not met, and a fault has been detected on a connection in the recovery group (A), the node causes traffic to be transferred from that connection to a backup path.

主权项

1. A method of performing fault detection and traffic recovery at a first node in a connection-oriented network, the network comprising a plurality of connections which are terminated at the first node, the method comprising:
configuring at the first node a recovery group comprising at least two of the plurality of connections; performing fault detection over each of the connections in the recovery group; determining if at least one recovery group fault condition is met, based on results of the fault detections performed over the connections in the recovery group; when the at least one recovery group fault condition is met, causing traffic on all of the connections in the recovery group to be transferred to backup paths; and when the at least one recovery group fault condition is not met, and a fault has been detected on a connection in the recovery group, causing traffic to be transferred from that connection to a backup path associated with that connection, wherein at least one of the connections of the recovery group has a different end node to other connections in the recovery group; and wherein the backup paths do not form part of the recovery group.