Lantronix
SM12XPA Web User Guide
33848 Rev. A
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Parameter descriptions
:
System Configuration
Mode
: on or off. Indicates if IEEE 802.1X 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. IEEE 802.1X defines
the encapsulation of the Extensible Authentication Protocol (EAP) over IEEE 802.11, known as "EAP over LAN" or
EAPOL. EAPOL was originally designed for IEEE 802.3 Ethernet in 802.1X-2001.Valid values are 1 - 65535
seconds. This has no effect on 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 function 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 switch will ignore new frames coming from the client during the
hold time. The Hold Time can be set to a number between 10 and 1000000 seconds.
