Enabling an Eth-Trunk Interface to Send SmartLink Flush Packets

If an Eth-Trunk interface is enabled to send SmartLink Flush packets, after the master and backup interfaces are switched, the new master interface sends SmartLink Flush packets to instruct the peer end to age MAC addresses. This function prevents data interruption caused by asynchronous MAC addresses.

Procedure

Run system-view
The system view is displayed.
Run vlan vlan-id
A control VLAN is created and its view is displayed.

The control VLAN is used to send SmartLink Flush packets between Eth-Trunk interfaces in manual 1:1 master/backup mode. The control VLAN ID must be the same as the VLAN ID of sent SmartLink Flush packets.
Run quit
Return to the system view.
Run interface eth-trunk trunk-id
The view of the Eth-Trunk interface in manual 1:1 master/backup mode is displayed.
Run port trunk allow-pass vlan { { vlan-id1 [ to vlan-id2 ] } &<1-10> | all }
The Eth-Trunk interface is enabled to allow packets from the control VLAN to pass through.

The VLAN ID of received and sent SmartLink Flush packets must be the same.
Run smart-link flush send vlan vlan-id
The Eth-Trunk interface is enabled to send SmartLink Flush packets.
Run commit
The configuration is committed.