4.Select the name to configure the server group.

5.Under Servers, click Edit for a configured server or click New to add a server to the group. If editing a configured server, select Trim FQDN, scroll right, and click Update Server.

If adding a new server, select a server from the drop-down menu, then select Trim FQDN, scroll right, and click Add Server.

6.Click Apply.

Using the CLI

(host)(config) #aaa server-group corp-serv

auth-server radius-2 match-authstring contains abc.corpnet.com trim-fqdn

Configuring Server-Derivation Rules

When you configure a server group, you can set the VLAN or role for clients based on attributes returned for the client by the server during authentication. The server derivation rules apply to all servers in the group. The user role or VLAN assigned through server derivation rules takes precedence over the default role and VLAN configured for the authentication method.

NOTE: The authentication servers must be configured to return the attributes for the clients during authentication. For instructions on configuring the authentication attributes in a Windows environment using IAS, refer to the documentation at

http://technet2.microsoft.com/windowsserver/en/technologies/ias.mspx.

The server rules are applied based on the first match principle. The first rule that is applicable for the server and the attribute returned is applied to the client and would be the only rule applied from the server rules. These rules are applied uniformly across all servers in the server group.

Table 55 describes the server rule parameters you can configure.

Table 55: Server Rule Configuration Parameters

Parameter

Description

Role or VLAN

The server derivation rules can be for either user role or VLAN assignment. With Role

 

assignment, a client can be assigned a specific role based on the attributes returned. In

 

case of VLAN assignment, the client can be placed in a specific VLAN based on the

 

attributes returned.

 

 

Attribute

This is the attribute returned by the authentication server that is examined for Operation and

 

Operand match.

 

 

Operation

This is the match method by which the string in Operand is matched with the attribute value

 

returned by the authentication server.

 

contains – The rule is applied if and only if the attribute value contains the string in

 

parameter Operand.

 

starts-with – The rule is applied if and only if the attribute value returned starts with the

 

string in parameter Operand.

 

ends-with – The rule is applied if and only if the attribute value returned ends with the

 

string in parameter Operand.

 

equals – The rule is applied if and only if the attribute value returned equals the string

 

in parameter Operand.

 

not-equals – The rule is applied if and only if the attribute value returned is not equal to

 

the string in parameter Operand.

 

value-of – This is a special condition. What this implies is that the role or VLAN is set to

 

the value of the attribute returned. For this to be successful, the role and the VLAN ID

 

 

Dell PowerConnect W-Series ArubaOS 6.2 User Guide

Authentication Servers 182

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Dell 6.2 manual Configuring Server-Derivation Rules

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