Scaling OAM for point-to-point trunking

摘要

A shared (proxy) OAM session is performed in a packet-based network on behalf of a plurality of connections. First and second connections are each routed between respective nodes of the network for carrying data traffic. The second connection shares a portion of the routing of the first connection. The shared OAM session is performed along a path which is co-routed with at least part of the shared portion of the routing of the first connection and the second connection. Failure notification signalling is propagated to an endpoint node of each of the first and second connections when the shared OAM session indicates a failure has occurred. The use of a shared OAM session reduces processing at nodes and reduces OAM traffic. Each connection can be a trunk, such as a PBT/PBB-TE trunk, or a service carried within a trunk.

主权项

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 on a first path between a first pair of endpoint nodes of the network and a second of the connections is routed on a second path between a second pair of endpoint nodes of the network, the first and second paths having a shared path portion, the method comprising:
establishing a first OAM session between the first pair of endpoint nodes; establishing a second OAM session between the second pair of endpoint nodes; establishing a third OAM session as a shared OAM session between an intermediate node on the shared path portion and another node on the shared path portion; and providing, by the intermediate node, fault notification information from the shared OAM session to the first and second OAM sessions when the shared OAM session indicates that a fault has occurred, wherein: the first OAM session exchanges messages between the endpoints of the first connection at a first rate; the second OAM session exchanges messages between the endpoints of the second connection at a second rate; and the shared OAM session exchanges messages between the intermediate node and the other node at a third rate which is faster than the first and second rates.