Dell PowerConnect W Clearpass 100 Software 3.7 Deployment Guide - Page 55

Network Access Servers, Creating a Network Access Server Entry

Page 55 highlights

The network has an Aruba wireless controller at 192.168.30.2 which should be configured to place all visitor traffic into VLAN ID 100. There is another Aruba wireless controller at 192.168.40.2 which should be configured to place visitor traffic into VLAN ID 200. 1. Create a new role named Sample role 2. Click the Add Attribute tab. 3. Select the Aruba vendor, and then select the Aruba-User-Vlan attribute from the drop-down list. Enter the following value for the attribute:

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Amigopod 3.7
|
Deployment Guide
RADIUS Services
|
55
The network has an Aruba wireless controller at 192.168.30.2 which should be configured to place all visitor
traffic into VLAN ID 100. There is another Aruba wireless controller at 192.168.40.2 which should be
configured to place visitor traffic into VLAN ID 200.
1.
Create a new role named
Sample role
2.
Click the
Add Attribut
e tab.
3.
Select the
Aruba
vendor, and then select
the Aruba-User-Vlan
attribute from the drop-down list. Enter
the following value for the attribute:
<?= GetAttr('NAS-IP-Address') == '192.168.30.2' ? '100' : '200'
4.
Select
Always
from the Condition drop-down list and click the
Add Attribute
button.
5.
Click the
 
Save Changes
button to apply the new settings to the role.
Explanation: The GetAttr() function returns the value of an attribute that was supplied to the RADIUS
server with the Access-Request. Here, the NAS-IP-Address attribute is retrieved, which will contain the IP
address of the NAS making the RADIUS request. PHP’s ternary operator (
?:
) is used to check if the NAS is
192.168.30.2; if it is, then 100 is returned as the VLAN ID. In all other cases, the value 200 is returned as the
VLAN ID.
Multiple ternary statements can be nested in parentheses to allow more than two values to be checked. For
example, to check against three values, and return a default value if none of the values are matched, use a
PHP expression like the following:
(GetAttr('NAS-IP-Address') == 'value1' ? 'result1' : (GetAttr('NAS-IP-Address') ==
'value2' ? 'result2' : (GetAttr('NAS-IP-Address') == 'value3' ? 'result3' :
'default_value')))
Network Access Servers
A
Network Access Server
(NAS) is a device that provides network access to users, such as a wireless
access point, network switch, or dial-in terminal server. When a user connects to the NAS device, a RADIUS
user authentication request (Access-Request packet) is generated by the NAS.
Network access servers are RADIUS clients, and must be predefined in order to access the RADIUS server.
For security, each NAS device must also have a shared secret which is known only to the device and the
RADIUS server.
Use the Network Access Servers list view to define the NAS devices for this server and to make changes to
existing NAS devices.
Creating a Network Access Server Entry
A new NAS device is added by clicking on the
Create
tab.