This read-write object enables or disables auto tracking on a specific port: when enabled(1), a platform-dependent triggering mechanism starts auto tracking sessions on that port, and when disabled(2), any current or in-progress auto tracking sessions on that port are terminated. An administrator uses this per-port control to selectively turn auto tracking on for ports where automatic MAC-based session tracking is desired while leaving other ports unaffected. For example, an admin might set etsysAutoTrackingPortEnable to disabled(2) on a port connected to a trusted server to stop it from being auto-tracked, immediately ending any session already active there.