Patent ID: 8824451

Claim:
A method for establishing an associated bidirectional Label-Switched Path (LSP), wherein the method comprises steps of: a head node sending a first PATH message for establishing or updating an LSP to an end node, wherein the first PATH message carries an object for identifying association; the end node sending to the head node a second PATH message for establishing or updating an LSP as a reverse LSP corresponding to the LSP established or updated by the head node, wherein the second PATH message carries an object for identifying association; and if attribute values of the objects for identifying association carried in the PATH messages sent by the head node and the end node are the same, the LSP and the reverse LSP being associated by the head node and the end node and becoming the associated bidirectional LSP, and if the LSP and the reverse LSP are established at the same time, the head node of the LSP or the end node of the reverse LSP carrying the same object for identifying association in a subsequent PATH updating message according to a preset strategy to associate the LSP and the reverse LSP.