User manual

APS User Manual
274
Parameter Description
Mode: Indicates if NAS is globally enabled or disabled on the switch. 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