NODE DEVICE AND COMMUNICATION METHOD

摘要

A first node apparatus transmits a first frame from a first port; stores, as loop detection information, information for distinguishing the first port and first identification information for identifying the first frame, in association with each other; and receives a second frame from a second node apparatus. When second identification information for identifying the second frame is identical with the first identification information, the first node apparatus updates port state information stored in association with a destination node apparatus of the second frame so as to indicate that transmission from the first port is not feasible. According to the updated information, the first node apparatus then selects a second port from which transmission is feasible, and transmits the second frame.