Niveo Professional NGSME16T2H - Manual (Page 80)

Chapter 3: Featuring Configuration – Web UI
Featuring Configuration – Web UI
NGSME16T2H User Manual | 80
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 an
EAPOL Success frame when entering the Guest VLAN.
While in the Guest VLAN, the switch monitors the link for EAPOL frames, and if one
such frame is received, the switch immediately takes the port out of the Guest VLAN
and starts authenticating the supplicant according to the port mode. If an EAPOL
frame is received, the port will never be able to go back into the Guest VLAN if the
"Allow Guest VLAN if EAPOL Seen" is disabled.