This read-write value names the configuration macro that gets applied to a port when it is classified into the associated smart port type, and the paired no_-prefixed macro runs when the port leaves that type. Admins use this to control exactly what configuration gets pushed automatically onto a port once a certain device type is detected. For example, setting this to a macro named cisco-phone would cause that macro's commands to run automatically the moment a port is recognized as connecting to an IP phone, and no_cisco-phone to run when the phone is unplugged.