radtest mac authentication

Hi, I'm pretty new to freeradius so apologies if it is a silly question. I have a server set up to do mac authentication with an ldap backend on debian wheezy. I'm trying to use radtest to verify mac authentication, but I don't find a way to add the calling-station-id attribute to the request. I see that in previous versions of radtest, there was a -g option to pass it, but it is no longer there. How can I add it to the request with a recent version? Cheers, Frederic