Cisco Systems IE 2000 Network Admission Control Layer 2 802.1x Validation, Flexible Authentication Ordering

13-27
Cisco IE 2000 Switch Software Configuration Guide
OL-25866-01
Chapter 13 Configuring IEEE 802.1x Port-Based Authentication
Information About Configuring IEEE 802.1x Port-Based Authentication
Network Admission Control Layer 2 802.1x Validation
The switch supports the Network Admission Control (NAC) Layer 2 802.1x validation, which checks
the antivirus condition or posture of endpoint systems or clients before granting the devices network
access. With NAC Layer 2 802.1x validation, you can do these tasks:
• Download the Session-Timeout RADIUS attribute (Attribute[27]) and the Termination-Action
RADIUS attribute (Attribute[29]) from the authentication server.
• Set the number of seconds between reauthentication attem pts as the value of the Session-Timeout
RADIUS attribute (Attribute[27]) and get an access policy against the client from the RADIUS
server.
• Set the action to be taken when the switch tries to reauthenticate the client by using the
Termination-Action RADIUS attribute (Attribute[29]). If the value is the DEFAULT or is not set, the
session ends. If the value is RADIUS-Request, the reauthentication process starts.
• Set the list of VLAN number or name or VLAN group name as the value of the Tunnel Group Private
ID (Attribute[81]) and the preference for the VLAN number or name or VLAN group name as the
value of the Tunnel Preference (Attribute[83]). If you do n ot configure the Tunnel Preference, the
first Tunnel Group Private ID (Attribute[81]) attribute is picked up from the list.
• View the NAC posture token, which shows the posture of the client, by using the show
authentication privileged EXEC command.
• Configure secondary private VLANs as guest VLANs.
Configuring NAC Layer 2 802.1x validation is similar to configuring 802.1x port-based authentication
except that you must configure a posture token on the RADIUS server. For information about
configuring NAC Layer 2 802.1x validation, see the “Configuring NAC Layer 2 802.1x Validation”
section on page 13-46 and the “Configuring Periodic Reauthentication” section on page 13-39.
For more information about NAC, see the Network Admission Control Software Configuration Guide.
For more configuration information, see the “Authentication Manager” section on page 13-6.
Flexible Authentication Ordering
You can use flexible authentication ordering to configure the order of methods that a port uses to
authenticate a new host. MAC authentication bypass and 802.1x can b e the primary or secondary
authentication methods, and web authentication can be the fallback method if either or both of those
authentication attempts fail. For the configuration commands, see “Configuring Optional 802.1x
Authentication Features” section on page 13-40