Patent ID: 8325611
Filing Date: 2012-12-04
Classification: H04L

Abstract:
1. A method of performing end-to-end Operation Administration and Maintenance (OAM) sessions on connections in a packet-based network, in which a first of the connections is routed between a first pair of endpoint nodes of the network for carrying data traffic and a second of the connections is routed between a second pair of endpoint nodes of the network for carrying data traffic, the second connection sharing a portion of the path of the first connection, the method comprising the steps of: establishing, by a first node of the first pair of endpoint nodes, a first OAM session with an intermediate node on the portion of the path which is shared by the first and second connections; establishing, by a first node of the second pair of endpoint nodes, a second OAM session with the intermediate node on the portion of the path which is shared by the first and second connections; establishing, by the intermediate node, a third OAM session as a shared OAM session along the portion of the path which is shared by the first and second connections; and propagating, by the intermediate node, fault notification signaling from the third OAM session to the first and second OAM sessions when the third OAM session indicates a fault has occurred on the portion of the path which is shared by the first and second connections.