1-2Master portThe master port can be either an Ethernet port or a manually-configured or static LACP aggregationgroup. For example, you can configure GigabitEthernet 1/0/1 of switch A in Figure 1-1 as the masterport through the command line.Slave portThe slave port can be either an Ethernet port or a manually-configured or static LACP aggregationgroup. For example, you can configure GigabitEthernet 1/0/2 of switch A in Figure 1-1 as the slave portthrough the command line.Flush messageWhen a forwarding link fails, the device will switch the traffic to the blocked standby link. The formerforwarding entries of each device in the network are no longer suitable for the new topology, so MACaddress forwarding entries and ARP entries must be updated throughout the network. In this case, theSmart Link group sends flush messages to notify other devices to refresh MAC address forwardingentries and ARP entries.Control VLAN for sending flush messagesThis control VLAN sends flush messages. When link switching occurs, the device (Switch A in Figure1-1) broadcasts flush messages in this control VLAN.Control VLAN for receiving flush messagesThis control VLAN is used for receiving and processing flush messages. When link switching occurs,the devices (Switch B and Switch C in Figure 1-1) receive and process flush messages of this controlVLAN, and then refresh MAC forwarding table entries and ARP entries.z Currently, the member ports of a Smart Link group cannot be dynamic link aggregation groups.z If the master port or slave port of a Smart Link group is a link aggregation group, you cannotremove this link aggregation group directly or change the aggregation group into a dynamicaggregation group. Before removing this aggregation group, you must unbind the link aggregationgroup from the Smart Link.
