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User Manual
3onedata proprietary and confidential
Copyright © 3onedata Co., Ltd.
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5.1.1 System Configuration
Mode
Indicates if Limit Control is globally enabled or disabled on the switch. If globally
disabled, other modules may still use the underlying functionality, but limit checks and
corresponding actions are disabled.
Aging Enabled
If checked, secured MAC addresses are subject to aging as discussed under Aging
Period .
Aging Period
If Aging Enabled is checked, 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 desired, consider the following scenario: Suppose
an end-host is connected to a 3rd 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 forward. To overcome this situation, enable aging. With aging
enabled, a timer is started once the end-host gets secured. When the timer expires,
the switch starts looking for frames from the end-host, and if such frames are not seen
within the next Aging Period, the end-host is assumed to be disconnected, and the
corresponding resources are freed on the switch.
5.1.2 Port Configuration
The table has one row for each port on the switch and a number of columns, which are:
Port
The port number for which the configuration below applies.
Mode
Controls whether Limit Control is enabled on this port. Both this and the Global Mode
must be set to Enabled for Limit Control to be in effect. Notice that other modules may