3com S7906E 설치 설명서

 

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When configuring monitor link, go to these sections for information you are interested in: 

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Overview 

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Monitor Link Configuration Example 

Monitor link is a port collaboration function. Monitor link is usually used in conjunction with Layer 2 

topology protocols. The idea is to adapt the up/down state of downlink ports to the up/down state of 

uplink ports, triggering link switchover on the downlink device in time.  

A monitor link group is a set of uplink ports and downlink ports. For the purpose of monitor link, uplink 

ports refer to the monitored ports while downlink ports refer to the ports adapted to the up/down state of 

the monitored ports. A port can be assigned to only one monitor link group. Both Layer 2 Ethernet ports 

and Layer 2 aggregate interfaces can be assigned to a monitor link group.  

The uplink is the link monitored by the monitor link group. The monitor link group is down when the 

group has no uplink ports or all uplink ports are down. The monitor link group is up when any uplink port 

is up.  

The downlink is the state-adaptive link in the monitor link group. The state of the downlink ports is 

always consistent with the up/down state of the monitor link group.  

A monitor link group works independently of other monitor link groups. When a monitor link group 

contains no uplink ports or all its uplink ports go down, the monitor link group goes down and forces all 

downlink ports down at the same time. When any uplink port goes up, the monitor link group goes up 

and brings up all the downlink ports.  

 

Do not manually shut down or bring up the downlink ports in a monitor link group.