Enabling Mac Address Migration Log Notifying - HP 5120 EI Series Lan Switching Configuration Manual

Figure 7 MAC address tables of devices when Client A roams to AP D
To enable MAC address roaming:
Step
1. Enter system view.
2. Enable MAC address
roaming.

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
1. Enter system view.
Command
system-view
mac-address mac-roaming enable
Command
system-view
28
Remarks
N/A
Disabled by default.
Remarks
N/A