I am planning a rollout of dot1x using mac-address authentication with SecureACS v4.0. Does anyone know if there is a way for ACS to point to a database of mac-addresses so I don't have to update it manually (say a machine is retired or a new machine is introduced)? I have a way collect mac-addresses but I am not sure if there is a way for ACS to look this up. From the ACS web interface, there is only a section for me to manually write in the mac-addresses. Since there will be well over 500 machines connected in my network, it would be highly inefficient to do this by hand. Thanks.