User’s Manual of GS-5220 LCD Series
371
• Aging Period
This setting applies to the following modes, i.e. modes using the Port
Security functionality to secure MAC addresses:
â– Single 802.1X
â– Multi 802.1X
â– MAC-Based Auth.
When the NAS module uses the Port Security module to secure MAC
addresses, the Port Security module needs to check for activity on the
MAC address in question at regular intervals and free resources if no
activity is seen within a given period of time. This parameter controls
exactly this period and can be set to a number between 10 and
1000000 seconds.
If reauthentication is enabled and the port is in a 802.1X-based mode,
this is not so critical, since supplicants that are no longer attached to
the port will get removed upon the next reauthentication, which will
fail. But if reauthentication is not enabled, the only way to free
resources is by aging the entries.
For ports in MAC-based Auth. mode, reauthentication doesn't cause
direct communication between the switch and the client, so this will
not detect whether the client is still attached or not, and the only way
to free any resources is to age the entry.
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