Figure 11-2.1: The IEEE 802.1X Configuration
Parameter description:
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
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 65535 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.
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,
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
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