User’s Manual of GS-5220 LCD Series
380
• 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; 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.
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