LevelOne GSW-4876 User Manual

Page 94

HAPTER

| Configuring the Switch

Configuring Security

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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 after 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.

◆

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. (Range: 1-4095)

◆

Max. Reauth. Count - The number of times that the switch transmits

an EAPOL Request Identity frame without receiving a response before

adding a port to the Guest VLAN. The value can only be changed if the

Guest VLAN option is globally enabled. (Range: 1-255)

◆

Allow Guest VLAN if EAPOL Seen - The switch remembers if an

EAPOL frame has been received on the port for the lifetime 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 (the default), the

switch will only enter the Guest VLAN if an EAPOL frame has not been

received on the port for the lifetime of the port. If enabled, the switch

will consider entering the Guest VLAN even if an EAPOL frame has been

received on the port for the lifetime of the port. The value can only be

changed if the Guest VLAN option is globally enabled.

Port Configuration

◆

Port – Port identifier.

◆

Admin State - If NAS is globally enabled, this selection controls the

port's authentication mode. The following modes are available:

■

Force Authorized - The switch sends one EAPOL Success frame

when the port link comes up. This forces the port to grant access to

all clients, either dot1x-aware or otherwise. (This is the default

setting.)

■

Force Unauthorized - The switch will send one EAPOL Failure

frame when the port link comes up. This forces the port to deny

access to all clients, either dot1x-aware or otherwise.

■

Port-based 802.1X - Requires a dot1x-aware client to be

authorized by the authentication server. Clients that are not dot1x-

aware will be denied access.