PATH SELECTION METHOD AND COMMUNICATION SYSTEM

PROBLEM TO BE SOLVED: To provide the path selection method in which a communication path is selected safely and accurately in the case of selecting the communication path in a network and the communication system using the method. SOLUTION: In the communication network consisting of a plurality of switches 101-122 and links 201-228 interconnecting the switches, in the case of selecting a communication path by regarding a logic network including logic switches 31-36 consisting at least one switch as a logic network, each of the switches 101-122 selects a communication path on the logic network based on attribute information of the links between at least one set of boundary switches connecting to other logic switch among switches forming the logic switches 31-36 and on attribute information of links with the other logic switch.