Smart Link Device Configuration Example - H3C S5120-EI Series Operation Manual

Configure protected VLANs for the
smart link group
Specify the
master port for
the smart link
group
Specify the slave
port for the smart
link group
Enable role preemption
Configure the preemption delay
Enable flush update in the specified
control VLAN
The protected-vlan command configures protected VLANs for a smart link group by referencing
MSTIs. To view VLAN-to-MSTI mappings, use the display stp region-configuration command.
For VLAN-to-MSTI mapping configuration, refer to MSTP Configuration in the Access Volume.
The preemption delay configuration takes effect only after preemption mode is enabled.
The protected VLANs configured for a smart link group must be different from those configured for
any other smart link group.
Make sure that the configured control VLANs are existing VLANs, and you must assign the smart
link group member ports to the control VLANs.
Do not remove the control VLANs. Otherwise, flush messages cannot be sent properly.

Smart Link Device Configuration Example

Network requirements
Create smart link group 1.
The protected VLANs of smart link group 1 are mapped to MSTI 0 through 8.
Configure GigabitEthernet 1/0/1 as the master port of the smart link group, and GigabitEthernet
1/0/2 as the slave port.
To do...
In smart link group
view
In Ethernet
interface view or
Layer-2 aggregate
interface view
In smart link group
view
In Ethernet
interface view or
Layer-2 aggregate
interface view
Use the command...
protected-vlan
reference-instance
instance-id-list
port interface-type
interface-number master
port smart-link group group-id
master
port interface-type
interface-number slave
port smart-link group group-id
slave
preemption mode role
preemption delay delay-time
flush enable [ control-vlan
vlan-id ]
1-4
Remarks
Required
By default, no
protected VLAN is
configured for a smart
link group.
Required
Use either approach.
Required
Use either approach.
Optional
Disabled by default.
Optional
1 second by default.
Optional
By default, VLAN 1 is
used for flush update.