Patent ID: 7359329
Filing Date: 2008-04-15
Classification: H04L

Abstract:
1. A computer-readable storage medium encoded with a computer program that when executed causes a computer to execute a method that detects network failures, based on information obtained from monitor target equipment which is disposed within a communication network and which has a plurality of communication interfaces, said method comprising: extracting traffic flow information indicating both an amount of receiving traffic and an amount of transmitting traffic in each interface of the monitor target equipment, from a storage device of the computer; setting a virtual point indicating the end or the starting point of the traffic inside the monitor target equipment computing an amount of abnormal traffic using a virtual point set in the monitor target equipment, among a plurality of segments of traffic inside the monitor target equipment, and using the traffic flow information to compute a first traffic flow using each interface and another interface as a starting point and an end point, respectively, of the traffic inside the monitor target equipment, a second traffic flow using each interface and the virtual point as the starting point and the end, respectively, a third traffic flow using the virtual point and each interface as the starting point and the end, respectively, and a fourth traffic flow using each interface as both the starting point and the end and computes a first total of the second, third and fourth traffic flows as the amount of abnormal traffic; and determining whether there is a network failure based on the amount of the abnormal traffic.