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If (re-)authentication fails or the RADIUS Access-Accept packet no longer carries a
VLAN ID or it's invalid, or the supplicant is no longer present on the port, the port's
VLAN ID is immediately reverted to the original VLAN ID (which may be changed by
the administrator without affecting the RADIUS-assigned). This option is only
available for single-client modes.
Port-based 802.1X
Single 802.1X
To trouble-shoot the VLAN assignments, use the "Monitor→VLANs→VLAN
Membership and VLAN Port" pages. These pages show which modules have
(temporarily) overridden the current port VLAN configuration.
RADIUS attributes used in identifying a VLAN ID: RFC2868 and RFC3580 form the
basis for the attributes used in identifying a VLAN ID in an Access-Accept packet. The
following criteria are used:
The Tunnel-Medium-Type, Tunnel-Type, and Tunnel-Private-Group-ID
attributes must all be present at least once in the Access-Accept packet.
The switch looks for the first set of these attributes that have the same Tag
value and fulfil the following requirements (if Tag == 0 is used, the Tunnel-
Private-Group-ID does not need to include a Tag):
o
Value of Tunnel-Medium-Type must be set to "IEEE-802" (ordinal
6).
o
Value of Tunnel-Type must be set to "VLAN" (ordinal 13).
o
Value of Tunnel-Private-Group-ID must be a string of ASCII chars in
the range 0-9, which is interpreted as a decimal string representing
the VLAN ID. Leading '0's are discarded. The final value must be in
the range [1; 4095].
Guest VLAN Enabled:
When the guest VLAN is both globally enabled and enabled
(checked) for a given port, the switch considers moving the port into the Guest VLAN
according to the rules outlined below.
This option is only available for EAPOL-based
modes:
Port-based 802.1X
Single 802.1X
Multi 802.1X
To trouble-shoot the VLAN assignments, use the "Monitor→VLANs→VLAN
Membership and VLAN Port" pages. These pages show which modules have
(temporarily) overridden the current Port VLAN configuration.
Guest VLAN Operation:
When a guest VLAN enabled port's link comes up, the
switch starts transmitting EAPOL request identity frames. If the number of
transmissions of such frames exceeds Max. Reauth. Count and no EAPOL frames
have been received, the switch will consider entering the guest VLAN. The interval
between transmissions of EAPOL request identity frames is configured with EAPOL
timeout. If “Allow Guest VLAN if EAPOL Seen” is enabled, the port will now be placed
in the guest VLAN. If it’s disabled, the switch will first check its history to see if an
EAPOL frame has previously been received on the port. This history is cleared if the
port link goes down or the port's Admin State is changed. If not, the port will be
placed in the guest VLAN. Otherwise, it will not move to the guest VLAN, but
continue transmitting EAPOL request identity frames at the rate given by EAPOL
timeout.