Patent ID: 8751637

Claim:
A network monitoring server that monitors a network having a plurality of switch devices, in which the plurality of switch devices each have a communication confirmation function using transmission and reception of a monitoring frame between ports, and an upper limit is set to the number of ports to which maintenance end points are assignable among the respective ports of the plurality of switch devices, the network monitoring server comprising: a processor that executes a program; a memory that stores the program executed by the processor therein; and an interface that is connected to the processor, wherein the processor calculates, for each of the plurality of switch devices, a monitoring priority corresponding to the probability of failures of a device connected to a network path including the port or the port, and generates data for displaying the calculated monitoring priority of each port in association with each port, and when the processor calculates the monitoring priority of a given port, the processor enhances the monitoring priority of the given port based on an accumulative operating time of a device connected to the given port or an accumulative operating time of each switch device that exists on a network path between one device connected to the given port and another device connected to the one device.