Method for Switching the Serving Services of Virtual Private Lan and a System Thereof

A system for switching a VPLS service comprising an access device and a PE device, further comprising:

• a fault detection module of the access device, adapted to detect whether a fault exists in a primary PW, and to notify a fault notifying module of a PE device on a secondary PW after detecting the fault;
• the fault notifying module of the PE device on the secondary PW, adapted to instruct an address replacement module within the PE devices except for a faulty PE device in the network to perform replacement operations, by transmitting a message containing faulty PE device information for instructing to perform PW switching, to the PE devices except for the faulty PE device in the network according to the received notification;
• the address replacement module of the PE devices except for the faulty PE device in the network, adapted to replace the faulty PE device corresponding to at least one forwarding path item in a VPLS forwarding table with the PE device on the secondary PW according to the received instruction to perform replacement operations.