A control method executed by a packet processing device, the control method includes receiving, by a first processor, a received packet; identifying first processing execution information corresponding to the received packet, from among a plurality of first processing execution information, by referring to the first memory, based on packet identification information included in the received packet; and transmitting processing specification information included in the identified first processing execution information together with the received packet, to a second processor, when the processing specification information included in the identified first processing execution information specifies processing by the second processor; receiving, by the second processor, the processing specification information included in the identified first processing execution information and the received packet; and executing the processing for the received packet in accordance with second processing execution information specified by the received processing specification information, by referring to the plurality of second processing execution information.