Patent ID: 8341327

Claim:
A server system comprising: a plurality of servers; an input/output (I/O) device; a switch for coupling the plurality of servers and the I/O device; and a manager for initializing the switch, wherein the I/O device includes a virtual function (VF) provided by a virtualization function; wherein the switch includes identifier association information which indicates associations between first identifiers recognizable to the plurality of servers and second identifiers managed by the manager; wherein, upon receipt of a packet from one of the plurality of servers, the switch converts a first identifier included in the packet into a second identifier associated with the first identifier based on the identifier association information; wherein the switch sends the packet to which the conversion has been applied to the I/O device; wherein, upon receipt of a packet from one of the plurality of servers, the switch attaches a server identifier for identifying the transmission source server to the packet; wherein the switch transfers the packet with the server identifier attached within the switch; and wherein the switch sends the packet from which the server identifier has been removed to the I/O device.