Lantech LGS-2624C User manual - page 139
Parameter description:
Aging Configuration
By default, dynamic entries are removed from the MAC table after 300
seconds. This removal is also called aging.
Configure aging time by entering a value here in seconds; for example, Age
time seconds.
The allowed range is 10 to 1000000 seconds.
Disable the automatic aging of dynamic entries by checking
Disable
automatic aging.
MAC Table Learning
If the learning mode for a given port is greyed out, another module is in
control of the mode, so that it cannot be changed by the user. An example
of such a module is the MAC-Based Authentication under 802.1X.
Each port can do learning based upon the following settings:
Auto
Learning is done automatically as soon as a frame with unknown SMAC is
received.
Disable
No learning is done.
Secure
Only static MAC entries are learned, all other frames are dropped.
Note: Make sure that the link used for managing the switch is added to the
Static Mac Table before changing to secure learning mode, otherwise the
management link is lost and can only be restored by using another non-
secure port or by connecting to the switch via the serial interface.