Users Guide

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244 | Authentication Servers Dell PowerConnect ArubaOS 5.0 | User Guide
5. Under Servers, click Edit for a configured server or click New to add a server to the group.
z If editing a configured server, select Trim FQDN, scroll right, and click Update Server.
z 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.
In the CLI
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.
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 49 describes the server rule parameters you can configure.
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.
Table 49 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.
z contains – The rule is applied if and only if the attribute value contains the string in
parameter Operand.
z starts-with – The rule is applied if and only if the attribute value returned starts with the
string in parameter Operand.
z ends-with – The rule is applied if and only if the attribute value returned ends with the
string in parameter Operand.
z equals – The rule is applied if and only if the attribute value returned equals the string in
parameter Operand.
z not-equals – The rule is applied if and only if the attribute value returned is not equal to the
string in parameter Operand.
z 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 returned
as the value of the attribute selected must be already configured on the controller when
the rule is applied.
Operand This is the string to which the value of the returned attribute is matched.