Patent ID: 8266261

Claim:
A server system comprising: a plurality of network control units that control communication performed with another device via a network, each network control unit being within an apparatus; an address storage unit that stores a MAC address to be assigned to the network control units, the address storage unit being within an apparatus; an assignment change processing unit that changes an assignment of the MAC address and writes in the address storage unit, the MAC address being stored in the address storage unit, the assignment change processing unit being within an apparatus; and an assignment execution unit that specifies the assignment stored in the address storage unit to each of the network control units, the assignment execution unit being within an apparatus, wherein, the plurality of network control units comprise an operation network control unit and a standby network control unit, the address storage unit stores a MAC address to be assigned to the operation network control unit and a MAC address to be assigned to the standby network control unit in a way that the MAC address to be assigned to the operation network control unit is different from the MAC address to be assigned to the standby network control unit, and when switching the operation network control unit and the standby network control unit, the assignment change processing unit switches the MAC address to be assigned to the operation network control unit stored in the address storage unit and the MAC address to be assigned to the standby network control unit stored in the address storage unit to write in the address storage unit.