Chapter 4: Web configuration
244 NS3552-8P-2S-V2 User Manual
The page includes the following fields:
System configuration
Object Description
Mode Indicates if Limit Control is globally enabled or disabled on the switchstack. If
globally disabled, other modules may still use the underlying functionality,
but limit checks and corresponding actions are disabled.
Aging Enabled If this check box is selected, secured MAC addresses are subject to aging as
discussed under Aging Period.
Aging Period If Aging Enabled is selected, then the aging period is controlled with this
input. If other modules are using the underlying port security for securing
MAC addresses, they may have other requirements to the aging period. The
underlying port security will use the shorter requested aging period of all
modules that use the functionality.
The Aging Period can be set to a number between 10 and 10,000,000
seconds.
To understand why aging may be required, consider the following scenario:
Suppose an end-host is connected to a third party switch or hub, which in
turn is connected to a port on this switch on which Limit Control is enabled.
The end-host will be allowed to forward if the limit is not exceeded. Now
suppose that the end-host logs off or powers down. If it wasn't for aging, the
end-host would still take up resources on this switch and will be allowed to
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