3Com 4210G Series, Configuration Manual, Page: 717 / 1133

1-9
To do... Use the command… Remarks
Clear the statistics about flush
messages
reset smart-link statistics
Available in user view
Smart Link Configuration Examples
Single Smart Link Group Configuration Example
Network requirements
As shown in Figure 1-2:
z
Map VLANs 1 through 10, VLANs 11 through 20, and VLANs 21 through 30 to MSTI 0, MSTI 1,
and MSTI 2 respectively.
z
Traffic of VLANs 1 through 30 on Device C and Device D are dually uplinked to Device A.
z
Configure Smart Link on the devices for dual uplink backup, using VLAN 1 (the default) for flush
update.
Figure 1-2
Single smart link group configuration
Device A
Device E
Device D Device C
Device B
GE
1/0
/1
GE1/0
/2
GE
1/0
/1
GE1/0
/1
GE1/0
/2
GE
1/0
/2
GE1/0/3
GE1/0/1
GE1/0/2
GE1/0/3
GE1/0/1
GE1/0/2
Master link
Slave link
Smart link group
Configuration procedure
1) Configuration on Device C
# Create VLANs 1 through 30, map VLANs 1 through 10, VLANs 11 through 20, and VLANs 21
through 30 to MSTI 0, MSTI 1, and MSTI 2 respectively, and activate the 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, and configure them as
trunk ports that permit VLANs 1 through 30.