You could probably use an utility like the mosy compiler to create a descriptive file usable with snmpinfo. Assuming the correct MIBs are in place, I would assume the information you desire could be collected.
Many MIBs used to be available at IBM's networking website, though I haven't looked at an AIX install since the late-90s, so availability could have changed.
That about exhausts my severely limited knowledge of the AIX MIB architecture.
Robert Richmond