Provided is a communication device that includes a plurality of ports, through which a frame is transmitted and received, and that forms a network together with at least one adjacent device connected via at least one port among the plurality of ports. The communication device includes an information acquisition unit that acquires information on the at least one adjacent device; a setting execution unit that executes, upon receipt of a setting command specified in advance, a setting processing for changing a setting of the communication device in accordance with the setting command; and a propagation execution unit that executes a propagation processing for transferring the setting command to the at least one adjacent device.