IFS NS3601-24P/4S GE-DSSG-244 and 244-POE User Manual
182
•
RADIUS-Assigned
VLAN Enabled
- When RADIUS-Assigned VLAN is both globally enabled and enabled
(checked) for a given port, the switch reacts to VLAN ID information
carried in the RADIUS Access-Accept packet transmitted by the
RADIUS server when a supplicant is successfully authenticated. If
present and valid, the port's Port VLAN ID will be changed to this VLAN
ID, the port will be set to be a member of that VLAN ID, and the port will
be forced into VLAN unaware mode. Once assigned, all traffic arriving
on the port will be classified and switched on the RADIUS-assigned
VLAN ID.
If (re-)authentication fails or the RADIUS Access-Accept packet no
longer carries a VLAN ID or it's invalid, or the supplicant is otherwise 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 in the
meanwhile without affecting the RADIUS-assigned).
This option is only available for single-client modes, i.e.
• Port-based 802.1X
• Single 802.1X
For trouble-shooting 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):
- Value of Tunnel-Medium-Type must be set to "IEEE-802" (ordinal 6).
- Value of Tunnel-Type must be set to "VLAN" (ordinal 13).
- 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 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, i.e.:
• Port-based 802.1X
• Single 802.1X
• Multi 802.1X
For trouble-shooting 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 in the
meanwhile, the switch considers entering the Guest VLAN. The interval between
transmission 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 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), and 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.
Once in the Guest VLAN, the port is considered authenticated, and all attached
clients on the port are allowed access on this VLAN. The switch will not transmit
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