Being the repeating installation where the repeating installation, MAC which records network and

摘要

PROBLEM TO BE SOLVED: To provide a relay apparatus capable of preventing inversion in the arrival sequence of frames and incorrect learning of a MAC address learning table.;SOLUTION: A port movement detection circuit 15 detects port movement generated by the arrival when a frame arrives at the MAC address learning table 11 from a route other than a learning finished route. A counter 16 counts the number of times when the port movement is detected by the port movement detection circuit 15. If a fault is detected at a relay apparatus 1, the port movement is monitored by the port movement detection circuit 15. When port movement of a first time occurs, the MAC address learning table 11 is updated. When port movement after second times occurs, the MAC address learning table 11 is not updated, and the frame generating the port movement is not transmitted, either.;COPYRIGHT: (C)2009,JPO&INPIT