This counter tracks the number of EIGRP packets dropped from the input queue because the queue was full, for this autonomous system. Any nonzero and growing value here is a direct sign that this router's control plane couldn't keep up with incoming EIGRP traffic for this AS, and a dropped update or query packet can delay convergence or, worse, cause the router to miss information it needs to compute correct routes. A router experiencing high CPU load from an unrelated process might see this counter start incrementing during that load spike, which an admin should treat as a symptom of that broader resource contention rather than an EIGRP-specific fault.