| 摘要 |
When a communication abnormality has occurred, links that are included in the communication path on which the communication abnormality has occurred and that are included in communication paths between nodes that allow communication are excluded while referring to information on physical links between nodes in the communication network and path information specifying at least one link included in communication paths between two points, and thereby the scope of positions that are plausible candidates for having been involved in a failure is narrowed.
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