COST SETTING DEVICE AND METHOD

PROBLEM TO BE SOLVED: To provide a cost setting device and a method, setting a plurality of routes reachable to a destination in a manner not to produce equal cost, in network communication constituted by routers.SOLUTION: A cost setting device 10 for setting the cost of a link L between routers 41 constituting a network includes: link information acquisition means for acquiring link information between the routers 41; bias derivation means for deriving a unique bias of the link L between the routers 41, on the basis of the link information acquired by the link information acquisition means; and bias transmission means for transmitting to the routers 41 the bias derived by the bias derivation means as a bias to be added to the cost of the link L.