A communication system includes a first communication device that configures a first wireless network together with another peripheral device or a plurality of other peripheral devices by using a first BSSID and a second communication device that configures a second wireless network together with another peripheral device or a plurality of other peripheral devices by using a second BSSID. The first communication device is configured to transmit a first frame in which a first identification value has been designated as a BSSID. The first communication device and the second communication device are configured to perform reception processing of a frame in which the first identification value has been designated as the BSSID, as a valid frame.