Configuring A Restricted Vlan - Cisco WS-CBS3032-DEL Software Configuration Manual

Configuring 802.1x Authentication

Configuring a Restricted VLAN

When you configure a restricted VLAN on a switch stack or a switch, clients that are
IEEE 802.1x-compliant are moved into the restricted VLAN when the authentication server does not
receive a valid username and password. The switch supports restricted VLANs only in single-host mode.
Beginning in privileged EXEC mode, follow these steps to configure a restricted VLAN. This procedure
is optional.
Command
Step 1 configure terminal
Step 2 interface interface-id
Step 3 switchport mode access
or
switchport mode private-vlan host
Step 4 authentication port-control auto
Step 5
authentication event fail action
authorize vlan-id
Step 6 end
Step 7
show authentication interface
interface-id
Step 8
copy running-config startup-config
To disable and remove the restricted VLAN, use the no authentication event fail action authorize
vlan-id interface configuration command. The port returns to the unauthorized state.
This example shows how to enable VLAN 2 as an 802.1x restricted VLAN:
Switch(config)# interface gigabitethernet2/0/2
Switch(config-if)# authentication event fail action authorize 2
You can configure the maximum number of authentication attempts allowed before a user is assigned to
the restricted VLAN by using the authentication event retry retry count interface configuration
command. The range of allowable authentication attempts is 1 to 3. The default is 3 attempts.
Beginning in privileged EXEC mode, follow these steps to configure the maximum number of allowed
authentication attempts. This procedure is optional.
Command
Step 1
configure terminal
Step 2 interface interface-id
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Purpose
Enter global configuration mode.
Specify the port to be configured, and enter interface configuration mode.
For the supported port types, see the
Configuration Guidelines" section on page
Set the port to access mode,
or
Configure the Layer 2 port as a private-VLAN host port.
Enable 802.1x authentication on the port.
Specify an active VLAN as an 802.1x restricted VLAN. The range is 1 to
4094.
You can configure any active VLAN except an internal VLAN (routed
port), an RSPAN VLAN, a primary private VLAN, or a voice VLAN as
an 802.1x restricted VLAN.
Return to privileged EXEC mode.
(Optional) Verify your entries.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Specify the port to be configured, and enter interface configuration mode.
For the supported port types, see the
Configuration Guidelines" section on page
Configuring IEEE 802.1x Port-Based Authentication
"802.1x Authentication
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"802.1x Authentication
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