Abstract: In the present invention, a method for automatically setting a routing table is provided with the following steps. (1) authenticating consistency of priority for each entry contained in the routing table in the event that there is a change in the table within the node; (2) updating entry(ies) where priority(ies) is(are) to be made high to maintain consistency with high priority(ies); (3) holding old information for a fixed period of time for entry(ies) where the priority becomes low in order to maintain consistency; and (4) acquiring consistency for the priority(ies) after a fixed time has elapsed. The automatic setting method can also be further provided with the following step: (5) before a fixed period of time elapses, sending a routing table that has acquired priority consistency to other nodes in the event that the routing information for the node has been referenced from other nodes. This step can also be executed using a separate step from the processing of the step (3).