H3C S5120-EI Series, Operation Manual

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Monitor Link Configuration Example
Network requirements
As shown in Figure 1-2 :
z
VLANs 1 through 10, 11 through 20, and 21 through 30 are mapped to MSTIs 0, 1, and 2
respectively. Traffic of VLANs 1 through 30 on Device C is dual-uplinked to Device A through a
smart link group.
z
It is required that when GE1/0/1 or GE1/0/2 of Device A fails, Device C can sense the link fault and
perform link switchover in the smart link group.
For detailed information about smart link, refer to
Smart Link Configuration
in the
High Availability
Volume
.
Figure 1-2
Network diagram for smart link in combination with monitor link configuration
Configuration procedure
1) Configuration on Device C
# Create VLANs 1 through 30, map VLANs 1 through 10 to MSTI 0, VLANs 11 through 20 to MSTI 1,
and VLANs 21 through 30 to MSTI 2, and activate MST region configuration.
<DeviceC> system-view
[DeviceC] vlan 1 to 30
[DeviceC] stp region-configuration
[DeviceC-mst-region] instance 0 vlan 1 to 10
[DeviceC-mst-region] instance 1 vlan 11 to 20
[DeviceC-mst-region] instance 2 vlan 21 to 30
[DeviceC-mst-region] active region-configuration
[DeviceC-mst-region] quit
# Disable STP on GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 separately, configure them as trunk
ports, and assign them to VLANs 1 through 30.
[DeviceC] interface gigabitethernet 1/0/1