Method, device and system for establishing pseudo wire

摘要

A method for establishment a pseudo wire (PW) is disclosed, including: receiving a first label mapping (LM) message, where the first LM message carries a PW ID, PW parameters, and label switching path (LSP) tunnel information that are selected by the sender of the first LM message; matching a local PW according to the PW ID; performing parameter negotiation of the local PW according to the PW parameters; matching a local tunnel according to the LSP tunnel information; binding the local tunnel and the local PW when the matching between the PW ID and the LSP tunnel information is successful; and establishing a PW when the parameter negotiation is successful. A device and system for establishing a PW are also disclosed. With the present invention, a PW service is associated with an LSP tunnel to improve the reliability of the information transmission process.

主权项

1. A method for establishing a pseudo wire, comprising:
receiving, by a second provider edge device, a label mapping message from a first provider edge device, wherein the label mapping message carries label switching path (LSP) tunnel information of an LSP tunnel between the first provider edge device and the second provider edge device, wherein the LSP tunnel information comprises a LSP tunnel identification (ID) of the LSP tunnel and the LSP tunnel information is used by the second provider edge device to establish the pseudo wire; determining, by the second provider edge device, the LSP tunnel according to the LSP tunnel ID; and after determining the LSP tunnel, establishing, by the second provider edge device, the pseudo wire according to the label mapping message, wherein the established pseudo wire is at least partially carried on the LSP tunnel.