Link fault diagnosis method based on time delay

Abstract

The invention discloses a link fault diagnosis method based on time delay. The link fault diagnosis method based on time delay comprises three stages of selection of a detection station, fault detection and fault positioning; time delay is adopted to judge link quality, detections are adopted to obtain link time delay, and a time delay standard of failing detections is given out; and a fault link is diagnosed by adopting an adaptive detection method, part of detections are selected to detect whether a fault is generated in a network, and then in the fault positioning stage, the detections are further selected to position the fault link. According to the link fault diagnosis method disclosed by the invention, the fault link can be accurately positioned, and less communication traffic is generated; and an experimental result shows that by the link fault diagnosis method disclosed by the invention, not only can the fault link be diagnosed, but also the number of the sent detections can be greatly reduced in the fault diagnosis process, and influence of the detections sent out in the fault diagnosis process on the network is reduced.

Description

technical field [0001] The invention belongs to the technical field of network fault diagnosis, in particular to a delay-based link fault diagnosis method. Background technique [0002] Statistics show that link faults account for about 80% of the total network faults. Therefore, link faults are one of the most common faults in the network. In addition to failures that cause link failure, there are various link failures, such as the following situations. A network storm caused by a network hardware failure such as a network card, or a network driver failure will degrade the link quality. The impact of worms slows down the network speed, and the worms distributed through E-mail have an increasingly serious impact on the network speed and are extremely harmful. Improper device configuration, such as inconsistent working mode configurations at both ends of the network, one end is in dual attack mode, and the other end is in half-duplex mode, resulting in packet loss. It is a...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a delay-based link fault diagnosis method, aiming to solve the problem of diagnosing link quality degradation and frequent packet loss due to link errors and other reasons

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