Research and realization of a network fault locating algorithm

In complex IP networks, faults usually have various uncertain causes. Therefore, it is essential for the fault locating system to realize accurate and quick fault locating. This paper puts forward a new symptom-fault map as the fault locating method for the fault propagation model-a fault locating method based on the Bayesian network, and a fault locating system is designed based on this method. This system, capable of simultaneously utilizing the characterization network and symptom information on whether the service application is normal or abnormal, has good resistance to noise, and can not only locate usability faults at low layers of the protocol stack, but also well locate service application faults at upper layers of the protocol stack, capable of accurately and quickly locating faults in a large IP network.