This read-write integer sets the queue-depth threshold at which frame-based discard (EPD/PPD) begins dropping whole frames, applicable only when ausmIngrDiscardOption is set to frameDiscard, and by rule must be configured below the queue's configured peak depth. Admins tune this to control how early, relative to full queue capacity, the frame-discard mechanism starts protecting the queue from overflow by shedding complete frames. For example, setting ausmIngrFrDiscardThreshold well below the peak queue depth gives the frame-discard mechanism room to act before the queue actually overflows and would otherwise be forced into less controlled cell-level loss.