Operation Manual – Smart Link-Monitor Link
H3C S3100 Series Ethernet Switches Chapter 2 Monitor Link Configuration
2-1
Chapter 2 Monitor Link Configuration
 Note:
Currently, only S3100-EI series Ethernet switches support the monitor link feature.
2.1 Introduction to Monitor Link
Monitor Link is a collaboration scheme introduced to complement for Smart Link. It is
used to monitor uplink and to perfect the backup function of Smart Link.
A monitor Link consists of an uplink port and one or multiple downlink ports. When the
link for the uplink port of a Monitor Link group fails, all the downlink ports in the Monitor
Link group are forced down. When the link for the uplink port recovers, all the downlink
ports in the group are re-enabled.
Switch A
Eth1/0/1
Eth1/0/2Eth1/0/3
Uplink
Downlink
Figure 2-1 Network diagram for a Monitor Link group implementation
As shown in
Figure 2-1, the Monitor Link group configured on the device Switch A
consists of an uplink port (Ethernet1/0/1) and two downlink ports (Ethernet1/0/2 and
Ethernet1/0/3). A member port can be an Ethernet port, static LACP aggregation group,
manual link aggregation group, or Smart Link group. A Smart Link group can serve as
the uplink port only.
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