Monitor Link Configuration Example - 3Com 4500G Family Configuration Manual

Monitor Link Configuration Example

Network requirements
As shown in Figure
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.
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
1-2:
1-4