Enabling an associated device to receive flush messages

• You do not need to enable all ports on the associated devices to receive flush messages. Enable the feature only on all control VLANs of ports on the primary and secondary links between the Smart Link device and the destination device.

• If no control VLAN is specified for processing flush messages, the device forwards the received flush messages without any processing.

• Make sure 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.

• Do not remove the control VLANs. Otherwise, flush messages cannot be sent correctly.

• Make sure the control VLANs are existing VLANs, and assign the ports capable of receiving flush messages to the control VLANs.

Disable the spanning tree feature on the associated device's ports that connect to the member ports of the smart link group. Otherwise, the ports will discard flush messages when they are not in forwarding state if a topology change occurs.

1. Enter system view.

   system-view

2. Enter Layer 2 Ethernet interface view or Layer 2 aggregate interface view.

   interface interface-type interface-number

3. Configure the control VLANs for receiving flush messages.

   smart-link flush enable [ control-vlan vlan-id-list ]

   By default, no control VLAN receives flush messages.