Example of Port Movement

The following figure shows Device A connected to port X.

Port X has a MAC lockdown timer setting of 100 seconds, and port Y has a MAC lockdown timer setting of 200 seconds.

expand icon
Port Movement with MAC Lockdown Timeout
../Graphics/EX_177.svg

Device A starts sending traffic on port X. The MAC address for Device A is learned and added to the FDB, and the MAC lockdown timer (100 seconds) is started for this entry.

After 50 seconds, Device A is disconnected from port X and connected to port Y where it begins sending traffic. When Device A starts sending traffic on port Y, the existing MAC entry for Device A is refreshed, and port X in the entry is replaced with port Y. At the same time, the MAC lockdown timer for the entry is restarted for a duration of 200 seconds (the configured MAC lockdown timer setting for port Y).