BRIDGE DEVICE, COMMUNICATION CONTROL DEVICE, COMMUNICATION CONTROL METHOD, BRIDGE PROGRAM, AND COMMUNICATION CONTROL PROGRAM

摘要

PROBLEM TO BE SOLVED: To prevent the loop or duplicate transfer of a frame in communication between networks part of which an L2 routing is applied to, the other part of which the L2 routing is not applied to and which are connected with a plurality of communication-enabled paths.SOLUTION: A network 10 to which a layer two routing technique is applied assumes an Ethernet network 20 to which the layer two routing technique is not applied as a virtual bridge device P, and performs layer two routing, frame learning, determination whether a frame is a loop frame or not, and frame processing (discard or transfer) based on these.