This read-only Counter64 counts the total number of received IGMP queries this PM instance discarded, for any reason. Admins treat it as a rollup alarm — a nonzero value means one of the specific reason-coded QueryDiscards counters on this same instance is climbing and worth checking individually; because it is drawn from the most recently completed 24-hour bin, frozen once the day rolled over, it is frozen and safe to use for day-over-day comparison, since no further traffic will ever be added to it. On an access port serving a multi-dwelling unit, a count of 2,985 over the last completed collection window is the kind of number an admin would trend against the join/leave rate on the same port to judge whether it's normal channel-surfing or an anomaly worth a closer look.