Publication date: June, 2015
Revision A1
Guest VLAN ID :
This is the value that a port's Port VLAN ID is set to if a port is moved into the Guest VLAN. It
is only changeable if the Guest VLAN option is globally enabled.
Valid values are in the range [1; 4095].
Max. Reauth. Count :
The number of times the switch transmits an EAPOL Request Identity frame without
response before considering entering the Guest VLAN is adjusted with this setting. The
value can only be changed if the Guest VLAN option is globally enabled.
Valid values are in the range [1; 255].
Allow Guest VLAN if EAPOL Seen :
The switch remembers if an EAPOL frame has been received on the port for the life-time of
the port. Once the switch considers whether to enter the Guest VLAN, it will first check if this
option is enabled or disabled. If disabled (unchecked; default), the switch will only enter the
Guest VLAN if an EAPOL frame has not been received on the port for the life-time of the
port. If enabled (checked), the switch will consider entering the Guest VLAN even if an
EAPOL frame has been received on the port for the life-time of the port.
The value can only be changed if the Guest VLAN option is globally enabled.
Port Configuration :
The table has one row for each port on the selected switch and a number of columns, which
are:
Port :
The port number for which the configuration below applies.
Admin State :
If NAS is globally enabled, this selection controls the port's authentication mode. The
following modes are available:
Force Authorized :
In this mode, the switch will send one EAPOL Success frame when the port link comes up,
and any client on the port will be allowed network access without authentication.
Force Unauthorized :
In this mode, the switch will send one EAPOL Failure frame when the port link comes up, and
any client on the port will be disallowed network access.
Port-based 802.1X :
In the 802.1X-world, the user is called the supplicant, the switch is the authenticator, and the
RADIUS server is the authentication server. The authenticator acts as the man-in-the-middle,
forwarding requests and responses between the supplicant and the authentication server.
Frames sent between the supplicant and the switch are special 802.1X frames, known as
EAPOL (EAP Over LANs) frames. EAPOL frames encapsulate EAP PDUs (RFC3748). Frames
sent between the switch and the RADIUS server are RADIUS packets. RADIUS packets also
encapsulate EAP PDUs together with other attributes like the switch's IP address, name, and
the supplicant's port number on the switch. EAP is very flexible, in that it allows for different
authentication methods, like MD5-Challenge, PEAP, and TLS. The important thing is that the
authenticator (the switch) doesn't need to know which authentication method the
supplicant and the authentication server are using, or how many information exchange
frames are needed for a particular method. The switch simply encapsulates the EAP part of
the frame into the relevant type (EAPOL or RADIUS) and forwards it.
When authentication is complete, the RADIUS server sends a special packet containing a
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