Manufacture Technology GEFXL2-CSW28KX User Manual page 251

Parameter description:
Mode :

Indicates if NAS is globally enabled or disabled on the switchstack. If globally disabled, all
ports are allowed forwarding of frames.
Reauthentication Enabled :

If checked, successfully authenticated supplicants/clients are reauthenticated after the
interval specified by the Reauthentication Period. Reauthentication for 802.1X-enabled
ports can be used to detect if a new device is plugged into a switch port or if a supplicant is
no longer attached.
For MAC-based ports, reauthentication is only useful if the RADIUS server configuration
has changed. It does not involve communication between the switch and the client, and
therefore doesn't imply that a client is still present on a port (see Aging Period below).
Reauthentication Period :

Determines the period, in seconds, after which a connected client must be reauthenticated.
This is only active if the Reauthentication Enabled checkbox is checked. Valid values are in
the range 1 to 3600 seconds.
EAPOL Timeout :

Determines the time for retransmission of Request Identity EAPOL frames.
Valid values are in the range 1 to 255 seconds. This has no effect for MAC-based ports.
Aging Period :

This setting applies to the following modes, i.e. modes using the Port Security functionality
to secure MAC addresses:
• Single 802.1X
• Multi 802.1X
• 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 an 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.
Hold Time :

This setting applies to the following modes, i.e. modes using the Port Security functionality
to secure MAC addresses:
• Single 802.1X
• Multi 802.1X
• MAC-Based Auth.
If a client is denied access - either because the RADIUS server denies the client access or
because the RADIUS server request times out (according to the timeout specified on the
"Configuration→Security→AAA" page) - the client is put on hold in the Unauthorized state.
The hold timer does not count during an on-going authentication.
In MAC-based Auth. mode, the The switch will ignore new frames coming from the client
during the hold time.
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Publication date: March, 2012
Revision A1