CONTROLLER, COMMUNICATION SYSTEM, COMMUNICATION METHOD AND PROGRAM

摘要

Disclosed is a control device which reduces a load of the control device responding to a transmission request for control information. The control device includes a control information management unit which manages control information including a match field and used for causing a packet which matches with the match field to be processed; a transmission request storage unit which stores uncontrolled transmission requests in transmission requests for control information for packets received by a switch under the control from the switch; and a request processing unit which selects a piece of control information having a looser match field from among pieces of control information managed by the control information management unit, selects an unprocessed transmission requests for control information which matches the selected piece of control information having a looser match field in unprocessed transmission requests for control information stored in the transmission request storage unit, and replies control information with the looser match field to the switch transmitting the unprocessed transmission requests for the control information.