ETHERNET LOOP LOCATING METHOD, SWITCHING DEVICE AND SYSTEM

摘要

The embodiments of the present invention relate to the field of communication and provide an Ethernet loop locating method, a switching device, and a system to locate loop fault ports precisely. The switching device receives an Ethernet frame, learns a MAC address according to a source MAC address of the Ethernet frame, and determines a learned associated port of the MAC address as a first port of the MAC address; uses a port after hopping as a second port of the MAC address when the associated port of the MAC address undergoes hopping for a first time after the MAC address is learned; and determines the second port as a loop fault port if the total number of hops of the associated port of the MAC address in a specified time is greater than or equal to a preset threshold. The embodiments of the present invention are intended to locate the loop fault port.