548 802.1X Commands
console#show dot1x advanced ethernet 1/g2
Port Guest Unauthenticated
VLAN Vlan
--------- --------- ---------------
1/g2 10 20
radius-server attribute 4
Use the radius-server attribute 4 command in Global Configuration mode to set the network 
access server (NAS) IP address for the RADIUS server. Use the no version of the command to set 
the value to the default.
Syntax
radius-server attribute 4 
ip-address
no dot1x guest-vlan
•
ip-address
 — Specifies the IP address to be used as the RADIUS attribute 4, the NAS IP 
address.
Default Configuration
If a RADIUS server has been configured on the switch, the default attribute 4 value is the 
RADIUS server IP address. 
Command Mode 
Global Configuration mode
User Guidelines
This command has no user guidelines.
Example
The following example sets the NAS IP address in RADIUS attribute 4 to 192.168.10.22.
console(config)#radius-server attribute 4 192.168.10.22