To determine whether the Apple's AppleTalk stack is running, at the AIX command prompt, type the following command:
# atconfig -q
If the message "The AppleTalk stack does not appear to be loaded" appears, then Apple's AppleTalk stack is not running, or the Helios' stack is running instead.
Another way to determine if Apple's version of AppleTalk is running, is use the 'ps -ef' command to list the processes that are running. Look for either the process named 'appletalk', or 'router'. If neither is present then the Apple's AppleTalk stack is not running.