Patent ID: 8144601
Filing Date: 2012-03-27
Classification: H04L

Abstract:
1. A fault detection method, comprising: determining, by a first node on an active Label Switching Path (LSP), a hop count from the first node to a second node on the active LSP along the LSP based on the Resource Reservation Protocol Traffic Engineering (RSVP-TE) wherein each of the first node and the second node is a node other than an egress node of the LSP, and initial value of the hop count is not less than 2; encapsulating, by the first node, a Bidirectional Forwarding Detection (BFD) packet into a Multi-Protocol Label Switching (MPLS) packet that carries information about the hop count; sending, by the first node, the MPLS packet from the first node to the second node along the LSP; and judging, by each node that has received the MPLS packet along the LSP, whether the node is the second node according to the hop count; extracting, by the second node, the BFD packet from the MPLS packet for performing the fault detection if the node that has received the MPLS packet is the second node; forwarding, by the node that has received the MPLS packet, the MPLS packet along the LSP if the node is not the second node.