A node for configuring a ring type network system in such a mode that a plurality of physical links belonging to difference rings exists between nodes opposite to each other, has a storage unit stored with link associated information representing an associated relationship between ports of physical links and a port of a virtual link virtually set up to at least one physical link, ring configuration information representing a paired relationship of the ports of the physical links configuring the different ring, port numbers of both ends of the physical link and port numbers of both ends of the virtual link, and a processing unit executing a process of transmitting, to other nodes, such information that one virtual link is associated with the plurality of physical links belonging to the different ring, and setting up, when receiving a signaling message for setting up a path, the path passing through the same ring on the basis of pass route information in the message and the storage information stored in the storage unit.