PROBLEM TO BE SOLVED: To efficiently measure time required for switching a communication path and accurately evaluate network device performance for a network configured based on a redundancy protocol.;SOLUTION: A network evaluation apparatus 1 and a test terminal 2 that are connected with each other are connected to a network 4. A program for instructing the test terminal 2 and network devices 6, 8, 10 to perform operations is stored in the network evaluation apparatus 1 in advance. The network evaluation apparatus 1 notifies the network devices 6, 8, 10 of initial setting information based on this program and makes them establish a redundancy network 4. Additionally, it makes the test terminal 2 start to transmit a frame 12 for test. Further, it makes the network devices 6, 8, 10 cause a pseudo-communication failure. In the network evaluation apparatus 1, the time required to switch the communication path is calculated.;COPYRIGHT: (C)2012,JPO&INPIT
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