Patent ID: 9509658
Filing Date: 2016-11-29
CPC Classification: H04L

Claim Text:
1. A method of restoring a MAC address in system that a plurality of administration target machines connects with an administration server through a network communication device, the method comprising: first transmitting a first frame, in which a origin of a transmission is a first MAC address held in the administration target machine, through the network communication device to the administration server which stores a first MAC address dynamically assigned to the administration target machine corresponding to a second MAC address uniquely assigned to the administration target machine, by the administration target machine, the network communication device admitting a passage of a frame, in which the origin of the transmission is a MAC address included in a permission list which stores the first MAC address and the second MAC address for each of the plurality of administration target machines; second transmitting a second frame, in which the origin of a transmission is the second MAC address of the administration target machine, through the network communication device to the administration server, when not receiving a reply for the first frame from the administration server, by the administration target machine; replying a third frame which includes the first MAC address stored in the administration server corresponding to the second MAC address in response to the second frame by the administration server; and restoring the held first MAC address to the first MAC address included in the third frame in response to the third frame and re-booting own administration target machine based on the restored first MAC address by the administration target machine.