AS Series User Manual
90
Doc No.: AS5-0116-01
Fig: The Network Access Server Configuration
Parameter
Description
Mode
Indicates if NAS is globally enabled or disabled on the switch. If globally
disabled, all ports are allowed forwarding of frames.
Reauthentcation
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
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