Configuration procedure – H3C Technologies H3C S7500E Series Switches User Manual
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Device C and Device D are smart link devices, and Device A, Device B, and Device E are
associated devices. Traffic of VLANs 1 through 30 on Device C and Device D are dually uplinked
to Device A.
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Configure Smart Link on Device C and Device D for dual uplink backup.
Figure 8-2 Network diagram for single smart link group configuration
Configuration procedure
1) Configuration on Device C
# Create VLANs 1 through 30, map these VLANs to MSTI 1, and activate the MST region
configuration.
<DeviceC> system-view
[DeviceC] vlan 1 to 30
[DeviceC] stp region-configuration
[DeviceC-mst-region] instance 1 vlan 1 to 30
[DeviceC-mst-region] active region-configuration
[DeviceC-mst-region] quit
# Disable STP on GigabitEthernet 2/0/1 and GigabitEthernet 2/0/2 separately, and configure them as
trunk ports that permit VLANs 1 through 30.
[DeviceC] interface gigabitethernet 2/0/1
[DeviceC-GigabitEthernet2/0/1] undo stp enable
[DeviceC-GigabitEthernet2/0/1] port link-type trunk
[DeviceC-GigabitEthernet2/0/1] port trunk permit vlan 1 to 30
[DeviceC-GigabitEthernet2/0/1] quit
[DeviceC] interface gigabitethernet 2/0/2
[DeviceC-GigabitEthernet2/0/2] undo stp enable
[DeviceC-GigabitEthernet2/0/2] port link-type trunk
[DeviceC-GigabitEthernet2/0/2] port trunk permit vlan 1 to 30
[DeviceC-GigabitEthernet2/0/2] quit
# Create smart link group 1, and configure all VLANs mapped to MSTI 1 as the protected VLANs.
[DeviceC] smart-link group 1
[DeviceC-smlk-group1] protected-vlan reference-instance 1
# Configure GigabitEthernet 2/0/1 as the master port and GigabitEthernet 2/0/2 as the slave port for
smart link group 1.