This value specifies which hardware queue inbound packets matching this ACL rule are directed into. Admins set it to steer specific traffic (matched by the rule) into a higher or lower priority queue than the device's default, overriding the standard per-802.1D-priority queue mapping. It defaults to a queue based on the number of assignable queues in the system (queue 0 for 1-3 queues, queue 1 for 4-7 queues, or queue 2 for 8 queues) and that default doesn't shift if other system settings change.