The present invention provides a physical
signal monitoring-based transmission link fault location method and
system in the technical field of transmission link fault location. The method comprises: step S1, a layer 2 switching
chip creating a register group, and an MCU creating a
MAC address table; step S2, when a new network device is accessed, the MCU performing anomaly
verification on a new
MAC address by means of the
MAC address table and then updating the MAC address table; step S3, performing fault location by means of a
queue controller watchdog event, and updating an event register on the basis of a fault type; step S4, the MCU reading the fault type from the event register to match a
fault handling measure from a
fault management table; and step S5, when a
fault handling measure is found, executing a transmission link
recovery operation on the basis of the
fault handling measure, and when no fault handling measure is found, reading switch data from the register group and uploading the switch data to a
server for fault location, or executing fault location on the basis of a console command inputted from a Console interface. The present invention has the
advantage that the convenience and timeliness of transmission link fault location are greatly improved.