NETWORK MONITORING DEVICE, NETWORK MONITORING METHOD, AND NETWORK MONITORING PROGRAM

摘要

A network monitoring device (20) sets, as monitoring targets, physical interfaces (41) of a Leaf node (24) and a Spine node (22), a link (26) connecting the Leaf node (24) and the Spine node (22), a transfer function unit (23) of the Spine node (22), and an overlay tunnel (42) established between a Leaf node (24) of an outgoing side and a Leaf node (24) of an arrival side. The network monitoring device (20) collects monitoring results for each monitoring target, and on the basis of the type of monitoring target in which a malfunction has occurred and the occurrence event, determines the malfunction type of said malfunction and the level of impact of the malfunction.