This counter is the running total of IGMP query messages the switch received but discarded for any reason, aggregating the more specific discard causes tracked elsewhere in this table, such as arriving too soon, a down port, a blocked port, or a missing server logical interface. On this element, a high value relative to IgmpnumQueries indicates the querier's messages are frequently being rejected, which is worth breaking down using the more specific counters rather than treating as one undifferentiated symptom. For example, if this total reads 300 while IgmpnumQueryDiscardsPortDown alone accounts for 280 of them, the real problem is port flapping, not the query traffic itself.