C
HAPTER
25
| General Security Measures
Network Access (MAC Address Authentication)
– 884 –
COMMAND USAGE
◆ When enabled, the VLAN identifiers returned by the RADIUS server
through the 802.1X authentication process will be applied to the port,
providing the VLANs have already been created on the switch. GVRP is
not used to create the VLANs.
◆ The VLAN settings specified by the first authenticated MAC address are
implemented for a port. Other authenticated MAC addresses on the
port must have same VLAN configuration, or they are treated as an
authentication failure.
◆ If dynamic VLAN assignment is enabled on a port and the RADIUS
server returns no VLAN configuration, the authentication is still treated
as a success, and the host assigned to the default untagged VLAN.
◆ When the dynamic VLAN assignment status is changed on a port, all
authenticated addresses are cleared from the secure MAC address
table.
EXAMPLE
The following example enables dynamic VLAN assignment on port 1.
Console(config)#interface ethernet 1/1
Console(config-if)#network-access dynamic-vlan
Console(config-if)#
network-access
guest-vlan
Use this command to assign all traffic on a port to a guest VLAN when
802.1x authentication is rejected. Use the no form of this command to
disable guest VLAN assignment.
SYNTAX
network-access guest-vlan vlan-id
no network-access guest-vlan
vlan-id - VLAN ID (Range: 1-4094)
DEFAULT SETTING
Disabled
COMMAND MODE
Interface Configuration
COMMAND USAGE
◆ The VLAN to be used as the guest VLAN must be defined and set as
active (See the vlan database command).
◆ When used with 802.1X authentication, the intrusion-action must be
set for “guest-vlan” to be effective (see the dot1x intrusion-action
command).
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