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Figure 5 MAC address tables of devices when Client A roams to AP D
To enable MAC address synchronization:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enable MAC address
synchronization.
mac-address mac-roaming
enable
By default, MAC address
synchronization is disabled.
Configuring MAC address move notifications and
suppression
The outgoing interface for a MAC address entry learned on interface A is changed to interface B
when the following conditions exist:
•
Interface B receives a packet with the MAC address as the source MAC address.
•
Interface B belongs to the same VLAN as interface A.
In this case, the MAC address is moved from interface A to interface B, and a MAC address move
occurs.
The MAC address move notifications feature enables the device to output MAC address move logs
when MAC address moves are detected.
If a MAC address is continuously moved between the two interfaces, Layer 2 loops might occur. To
detect and locate loops, you can view the MAC address move information. To display the MAC
address move records after the device is started, use the
display mac-address mac-move
command.
If the system detects that MAC address moves occur frequently on an interface, you can configure
MAC address move suppression to shut the interface down. The interface automatically goes up
after a suppression interval. Or, you can manually bring up the interface.
The MAC address move suppression feature must work with the ARP fast update for MAC address
moves feature. For information about ARP fast update for MAC address moves, see "
fast update for MAC address moves
."