1-6z Configure all the control VLANs to receive flush messages.z If no control VLAN is specified for processing flush messages, the device forwards the receivedflush messages directly without processing them.z Make sure that the receive control VLAN is the same as the transmit control VLAN configured onthe Smart Link device. If they are not the same, the associated device will forward the receivedflush 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 ofreceiving flush messages to the control VLANs.Associated Device Configuration ExampleNetwork requirementsConfigure GigabitEthernet 1/0/1 to receive and process flush messages in VLAN 20.Configuration procedure 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 20Displaying and Maintaining Smart LinkTo do... Use the command… RemarksDisplay smart link groupinformationdisplay smart-link group{ group-id | all } Available in any viewDisplay information about thereceived flush messages display smart-link flush Available in any viewClear the statistics about flushmessages reset smart-link statistics Available in user viewSmart Link Configuration ExamplesSingle Smart Link Group Configuration ExampleNetwork requirementsAs 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.
