This read-only Counter64 counts queries discarded because the ingress port was in a blocking state (for example, held down by spanning tree or an access-control action) when the query arrived. This ties multicast query loss directly to L2 loop-prevention or security state on the port, useful when troubleshooting why an IPTV stream briefly drops during a topology change; because it is drawn from the current, still-open 24-hour bin for today, the number keeps climbing until midnight rollover, so it should be read as "so far today" rather than a finished daily total. On an uplink toward the multicast-enabled core router, a count of 1,374 over today so far 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.