Patent ID: 8179900

Claim:
An edge node redundant system in a label switching network for transferring a packet having a tunnel label, the edge node redundant system comprising: a primary edge node device; and a secondary edge node device, wherein the primary edge node device comprises: a first tunnel control unit configured to set a protection-target label switching path between a remote edge node device in the label switching network and the primary edge node device, to set a backup label switching path routed through the secondary edge node device and used as a bypass route for the protection-target label switching path, and to transmit session information of the protection-target label switching path to the secondary edge node device; a first tunnel label database configured to store a tunnel label of the protection-target label switching path and a tunnel label of the backup label switching path; and a first tunnel processing unit configured to perform a packet transfer between the remote edge node device and the primary edge node using the first tunnel label database, the secondary edge node device comprises: a second tunnel control unit configured to receive the session information of the protection-target label switching path from the primary edge node device; a second tunnel label database configured to store the tunnel label of the backup label switching path; and a second tunnel processing unit configured to, when a failure occurs in the primary edge node device, take over a label switching path session from the primary edge node device in accordance with the session information of the protection-target label switching path and to perform a packet transfer between the remote edge node device and the secondary edge node device using the second tunnel label database, and the secondary edge node device operates as a start-point node or an end-point node of the protection-target label switching path when the failure occurs in the primary edge node device.