Patent ID: 8677015
Filing Date: 2014-03-18
Classification: H04L

Abstract:
1. A non-transitory computer readable recording medium storing a link trace frame transfer program to cause a computer to execute operations, comprising: updating a MAC learning table storing that stores a correspondence relationship of a MAC address and port identification information identifying a port for transferring a frame to which the MAC address is assigned; executing a first transfer that includes reading a MAC address of a link trace frame and transferring the link trace frame via a port determined by a correspondence relationship in the MAC learning table; saving an object to be deleted in a predetermined storage unit at a time of updating the MAC learning table, said object identifying the correspondence relationship stored; executing a second transfer that includes transferring the link trace frame via a port determined by a correspondence relationship saved in the storage unit upon determining that there is no correspondence relationship relevant to the MAC address assigned to the link trace frame in the MAC learning table; and returning a response frame to a switching hub which is an originator of the link trace frame simultaneously with execution of each of the first transfer and second transfer, where the correspondence relationship identified by the object is deleted and causes the MAC learning table to relearn the correspondence relationship upon receipt of the response frame.