H3C S5120-EI Series User Manual

1-6
z Configure all the control VLANs to receive flush messages.
z If no control VLAN is specified for processing flush messages, the device forwards the received
flush messages directly without processing them.
z Make sure that the receive control VLAN is the same as the transmit control VLAN configured on
the Smart Link device. If they are not the same, the associated device will forward the received
flush messages directly without any processing.
z Do not remove the control VLANs. Otherwise, flush messages cannot be sent properly.
z Make sure that the control VLANs are existing VLANs, and you must assign the port capable of
receiving flush messages to the control VLANs.
Associated Device Configuration Example
Network requirements
Configure GigabitEthernet 1/0/1 to receive and process flush messages in VLAN 20.
Configuration procedure
<Sysname> system-view
[Sysname] vlan 20
[Sysname-vlan20] quit
[Sysname] interface gigabitethernet1/0/1
[Sysname-GigabitEthernet1/0/1] port link-type trunk
[Sysname-GigabitEthernet1/0/1] port trunk permit vlan 20
[Sysname-GigabitEthernet1/0/1] smart-link flush enable control-vlan 20
Displaying and Maintaining Smart Link
To do... Use the command… Remarks
Display smart link group
information
display smart-link group
{ group-id | all }
Available in any view
Display information about the
received flush messages
display smart-link flush
Available in any view
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, both Device C and Device E are dually uplinked to Device A.
Configure Smart Link on the devices for uplink backup, adopting VLAN 1 (the default) for flush update.

H3C S5120-EI Series Specifications

General

Brand	H3C
Model	S5120-EI Series
Category	Switch
Language	English