To Configure the ACS Login Authentication MethodThe default authentication method for ACS is Local. You can either accept the default or select another authentication method from the “Unit Authentication” pull-down menu on the AuthType form.Any authentication method selected for ACS is used for authentication of any user attempting to log into the ACS through Telnet, SSH, or the Web Manager.
2. To specify an authentication method for login to ACS, select a method from the “Unit Authentication” pull-down menu.
4. Make sure an authentication server is specified for the selected authentication type.