CONTROLLER, LOAD-BALANCING METHOD, NON-TEMPORARY COMPUTER-READABLE MEDIUM FOR STORING PROGRAM, COMPUTER SYSTEM, AND CONTROL DEVICE

摘要

An OpenFlow network includes multiple controllers (1). Each controller (1) includes a load control table (153) and a load control unit (14). The load control table (153) controls at least one of the number of messages which each of switches (2) in the OpenFlow network has transmitted to a controller (1) controlling the switch (2) over a predetermined time and the number of packets that the switch (2) has received over a predetermined time. When a predetermined event occurs, the load control unit (14) detects a controller (1) having a processing load higher than or equal to a first threshold on the basis of the load control table (153) and places at least one of the switches (2) controlled by the detected controller (1) under the control of another controller (1).