User Manual

User Manual rev. 1.0. Feb. 2016
80
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 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.
 Port State :
The current state of the port. It can undertake one of the following values:
Globally Disabled: NAS is globally disabled.
Link Down: NAS is globally enabled, but there is no link on the port.
Authorized: The port is in Force Authorized or a single-supplicant mode and the supplicant
is authorized.