3Com 4200G 12-Port Configuration Manual page 677

Slave port
The slave port can be either an Ethernet port or a manually-configured or static LACP aggregation
group. For example, you can configure GigabitEthernet 1/0/2 of switch A in
through the command line.
Flush message
When a forwarding link fails, the device will switch the traffic to the blocked standby link. The former
forwarding entries of each device in the network are no longer suitable for the new topology, so MAC
address forwarding entries and ARP entries must be updated throughout the network. In this case, the
smart link group sends flush messages to notify other devices to refresh MAC address forwarding
entries and ARP entries.
Control VLAN for sending flush messages
This control VLAN sends flush messages. When link switching occurs, the device (Switch A in
1-1) broadcasts flush messages in this control VLAN.
Control VLAN for receiving flush messages
This control VLAN is used for receiving and processing flush messages. When link switching occurs,
the devices (Switch B and Switch C in
VLAN, and then refresh MAC forwarding table entries and ARP entries.
Currently, the member ports of a smart link group cannot be dynamic link aggregation groups.
If the master port or slave port of a smart link group is a link aggregation group, you cannot remove
this link aggregation group directly or change the aggregation group into a dynamic aggregation
group. Before removing this aggregation group, you must unbind the link aggregation group from
the Smart Link.
Figure 1-1) receive and process flush messages of this control
1-2
Figure 1-1 as the slave port
Figure