Authorization FreeRadius on Switches Extreme

Hi all I have a network with switches Extreme working with FreeRadius (Authentication), on documentation of Extreme http://www.extremenetworks.com/libraries/services/ExtremeXOSConceptsGuideSof... that is possible implement with authorization, but I could not implement. Someone Know how could implement authorization with FreeRadius? or is necessary use a language Script like unlang (Perl, Python)? Best Regards Mark Ricardez