28
Figure 7
MAC address tables of devices when Client A roams to AP D
To enable MAC address roaming:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enable MAC address
roaming.
mac-address mac-roaming enable
Disabled by default.
Enabling MAC address migration log notifying
This feature records and notifies MAC address migration information, including MAC addresses that
migrate, IDs of VLANs to which MAC addresses belong, source interfaces from which MAC addresses
migrate, and current interfaces with which MAC addresses associate, last migration time, and migration
times in the last one minute.
MAC address migration refers to this process: a device learns a MAC address from an interface, Port A
for example, and the device later learns the MAC address from another interface, Port B for example. If
Port A and Port B belong to the same VLAN, the outgoing interface in the entry for the MAC address is
changed to Port B from Port A, which means that the MAC address migrates from Port A to Port B.
TIP:
If a MAC address migrates between two specific interfaces frequently, a Layer 2 loop probably occurs in
the network. To discover and locate Layer 2 loops, you can enable MAC address migration log notifying.
To enable MAC address migration log notifying:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
