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Chapter 9
Configuring IEEE 802.1x Port-Based Authentication
When the port is in the force authorized, force unauthorized, unauthorized, or shutdown state, it is put
into the configured access VLAN.
If an 802.1x port is authenticated and put in the RADIUS server-assigned VLAN, any change to the port
access VLAN configuration does not take effect. In the case of a multidomain host, the same applies to
voice devices when the port is fully authorized with these exceptions:
•
•
The 802.1x authentication with VLAN assignment feature is not supported on trunk ports, dynamic
ports, or with dynamic-access port assignment through a VLAN Membership Policy Server (VMPS).
To configure VLAN assignment you need to perform these tasks:
•
•
•
For examples of tunnel attributes, see the
Attributes" section on page
802.1x Authentication with Per-User ACLs
You can enable per-user access control lists (ACLs) to provide different levels of network access and
service to an 802.1x-authenticated user. When the RADIUS server authenticates a user connected to
an 802.1x port, it retrieves the ACL attributes based on the user identity and sends them to the switch.
The switch applies the attributes to the 802.1x port for the duration of the user session. The switch
removes the per-user ACL configuration when the session is over, if authentication fails, or if a
link-down condition occurs. The switch does not save RADIUS-specified ACLs in the running
configuration. When the port is unauthorized, the switch removes the ACL from the port.
You can configure router ACLs and input port ACLs on the same switch. However, a port ACL takes
precedence over a router ACL. If you apply input port ACL to an interface that belongs to a VLAN, the
port ACL takes precedence over an input router ACL applied to the VLAN interface. Incoming packets
received on the port to which a port ACL is applied are filtered by the port ACL. Incoming routed packets
received on other ports are filtered by the router ACL. Outgoing routed packets are filtered by the router
ACL. To avoid configuration conflicts, you should carefully plan the user profiles stored on the RADIUS
server.
OL-12247-04
If the VLAN configuration change of one device results in matching the other device configured or
assigned VLAN, authorization of all devices on the port is terminated and multidomain host mode
is disabled until a valid configuration is restored where data and voice device configured VLANs no
longer match.
If a voice device is authorized and is using a downloaded voice VLAN, the removal of the voice
VLAN configuration, or modifying the configuration value to dot1p or untagged results in voice
device un-authorization and the disablement of multi-domain host mode.
Enable AAA authorization by using the network keyword to allow interface configuration from the
RADIUS server.
Enable 802.1x authentication. (The VLAN assignment feature is automatically enabled when you
configure 802.1x authentication on an access port).
Assign vendor-specific tunnel attributes in the RADIUS server. The RADIUS server must return
these attributes to the switch:
[64] Tunnel-Type = VLAN
–
[65] Tunnel-Medium-Type = 802
–
[81] Tunnel-Private-Group-ID = VLAN name or VLAN ID
–
Attribute [64] must contain the value VLAN (type 13). Attribute [65] must contain the value 802
(type 6). Attribute [81] specifies the VLAN name or VLAN ID assigned to the
IEEE 802.1x-authenticated user.
7-35.
Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
Understanding IEEE 802.1x Port-Based Authentication
"Configuring the Switch to Use Vendor-Specific RADIUS
9-17
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