This read-only Counter64 counts queries discarded specifically because they arrived before the minimum allowed interval since the previous query. This typically flags a misconfigured or rogue second querier flooding queries faster than the IGMP query interval allows — a cause the general QueryDiscards counter on this instance would not distinguish; 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 uplink toward the multicast-enabled core router, a count of 1,137 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.