Patent ID: 8971189
Filing Date: 2015-03-03
Classification: H04L

Abstract:
1. A method of processing an operation and maintenance (OAM) data transmission unit (DTU) in a multi-protocol label switched (MPLS) network at an intermediate node between a source node and a destination node of a first label switched path (LSP), the source node, destination node and intermediate node being capable of processing OAM DTUs, the method comprising: receiving a DTU at the intermediate node, the intermediate node being a defined end point of a second LSP that comprises a segment of the first LSP; identifying that a top level label of the DTU is a label assigned to the second LSP; determining that the DTU has been received on the second LSP based on the label assigned to the second LSP; and in response to identifying the label assigned to the second LSP, determining that a label in the DTU following the label assigned to the second LSP is a label indicating that the DTU is an OAM DTU.