H3C S5120-EI Series, Руководство по эксплуатации

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Monitor Link Configuration
When configuring monitor link, go to these sections for information you are interested in:
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Overview
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Configuring Monitor Link
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Displaying and Maintaining Monitor Link
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Monitor Link Configuration Example
Overview
Monitor link is a port collaboration function. Monitor link is usually used in conjunction with Layer 2
topology protocols. The idea is to monitor the states of uplink ports and adapt the up/down state of
downlink ports to the up/down state of uplink ports, triggering link switchover on the downstream device
in time, as shown in
Figure 1-1 .
Figure 1-1
Network diagram for monitor link application scenario
Device A
Device D Device B
Core network
GE
1/0
/1
GE
1/0
/1
GE1/0
/1
GE1/0
/2
GE
1/0
/2
GE1/0/3
GE1/0/3
User network
Uplink
Downlink
Monitor link group
Device C
GE1/0
/1
GE
1/0
/2
GE1/0
/2
Terminology
Monitor link group
A monitor link group is a set of uplink and downlink ports. A port can belong to only one monitor link
group. As shown in
Figure 1-1 , ports GE1/0/1 and GE1/0/2 of Device B and those of Device D each
form a monitor link group. GE1/0/1 on both devices are uplink ports, and GE1/0/2 on both devices are
downlink ports.