Patent ID: 7778190

Claim:
A method for correlating a plurality of label switched paths of a pseudowire, comprising: receiving a first message at a second label switching router, the first message sent from a first label switching router, the first message comprising a pseudowire identifier and a first label switched path identifier, the pseudowire identifier identifying a pseudowire, the first label switched path identifier identifying a first label switched path that implements the pseudowire; sending a second message from the second label switching router to the first label switching router, the second message comprising the pseudowire identifier and a second label switched path identifier, the second label switched path identifier identifying a second label switched path that implements the pseudowire; mapping the first and second label switched path identifiers to the pseudowire identifier for failure notification; at the second label switching router, expecting one or more failure detection packets from the first label switching router, the one or more failure detection packets sent from the first label switching router along the first label switched path based on the mapping; and detecting a failure of the first label switched path in accordance with the expectation.