Patent ID: 7468944

Claim:
A path fault recovery method, in which a first extreme point node of an active path issues a resource securing request message and a second extreme point node of the active path issues a switch changeover request message, the messages being transferred hop by hop to the other extreme point node along the route of a predetermined standby path, the method comprising: releasing extra traffic in response to receipt of the resource securing request message, wherein the extra traffic is communicated traffic which is supposed to be removed from the standby path, and the resource securing request message is delivered only to specific nodes on the standby path which are required to release the extra traffic, wherein the specific nodes on the standby path are urged to release the extra traffic in response thereto, securing a resource reserved for the standby path after releasing the extra traffic, and setting a switch of each node on the route of the standby path according to the secured resource in response to receipt of the switch changeover request message issued from the second extreme point node after the resource is secured for each node on the route of the standby path.