Patent ID: 8018836
Filing Date: 2011-09-13
Classification: H04L

Abstract:
1. A route confirmation method comprising: a first step of receiving a notification of starting a protection route communication confirmation or quality confirmation from a manager device including a destination network address and a confirmation identifier indicating a type of confirmation and storing the destination network address and the confirmation identifier instructed by the notification, a second step of mirroring a received unicast packet addressed to the destination network address instructed by the notification and setting the confirmation identifier instructed by the notification in a predetermined area within a header of the packet obtained by the mirroring to be transferred to a preselected protection route when the received unicast packet addressed to the destination network address instructed by the notification does not include the confirmation identifier instructed by the notification, and a third step of notifying the manager device of a result of the communication confirmation or quality confirmation and transferring the received unicast packet to the protection route when the received unicast packet is addressed to the destination network address instructed by the notification and includes the confirmation identifier instructed by the notification.