Patent ID: 8024457
Filing Date: 2011-09-20
Classification: H04L

Abstract:
1. A method of routing an operation and maintenance (OAM) data transmission unit (DTU) in a multi-protocol label switched (MPLS) network, between a source node and a destination node, the MPLS network having a label switched path (LSP), the source node and the destination node being capable of processing OAM DTUs, the source node and the destination node having intermediate nodes disposed therebetween, the intermediate nodes including OAM nodes, the OAM nodes being capable of processing OAM DTUs, the method comprising: a) defining segments of the LSP path in accordance with the source node, the destination node and the OAM nodes; b) defining an OAM label for the DTU in accordance with the segments; c) providing to the intermediate nodes instructions on at least one of how to forward the OAM DTU and how to process the OAM DTU; and d) binding the OAM label to the OAM DTU in an OAM label field, the OAM DTU including an MPLS label in an MPLS label field, the OAM label field being distinct from the MPLS label field.