H3C Technologies H3C S12500 Series Switches - Manual (Page 133)

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In interface view
To configure member ports for a monitor link group in interface view:
Step Command
1. Enter system view. system-view
2. Enter Layer 2 Ethernet interface view or Layer 2
aggregate interface view.
interface interface-type interface-number
3. Configure the current interface as a member of a
monitor link group.
port monitor-link group group-id { uplink |
downlink }
NOTE:
•
You can assign a Layer 2 Ethernet interface or Layer 2 aggregate interface to a monitor link group as a
member port.
• A port can be assigned to only one monitor link group.
• Configure uplink ports prior to downlink ports to avoid undesired down/up state changes on the
downlink ports.
Displaying and maintaining Monitor Link
Task Command Remarks
Display monitor link group
information.
display monitor-link group
{ group-id | all } [ | { begin |
exclude | include }
regular-expression ]
Available in any view.
Monitor Link configuration example
IMPORTANT:
By default, Ethernet, VLAN, and aggregate interfaces are in DOWN state. Before configuring these
interfaces, use the undo shutdown command to bring them up.
Network requirements
As shown in Figure 27 , Switch C is a smart link device, and Switch A, Switch B, and Switch D are
associated devices. Traffic of VLANs 1 through 30 on Switch C is dual-uplinked to Switch A through a
smart link group.
Implement dual uplink backup on Switch C, and make sure that when the link between Switch A and
Switch B (or Switch D) fails, Switch C must be able to sense the link fault and perform uplink switchover
in the smart link group.
For more information about the Smart Link feature, see "Configuring Smart Link."