| 摘要 |
A large scale network comprising a network management system ( 11 ) being provided with a timer ( 8 ), wherein a network element directs a link up or link down to one port of the network element ( 12, 13 ) from the network management system and, after that, if a message indicating that the link up or link down is complete is received from a different port from a port from which the link up or link down has been directed within a predetermined time by the timer after an issuance of the link up or link down directions, the maintainer ( 7 ) of the network management system recognizes a physical connection between the port from which the link up or link down has been directed and a port from which the message has been sent to the network management system, whereby large scale network can be provided in which a maintainer of a network management system can easily confirm a link connection between network elements.
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