This counter records the number of bytes the access port's shaper proactively discarded via its Random Early Discard congestion-avoidance mechanism. A nonzero count shows the admin that the port began shedding traffic early to avoid a full queue, a gentler sign of congestion than tail drops. For example, if cmAccPortQosShaperStatsBREDD rises steadily during business hours, the admin might consider it evidence of chronic underprovisioning on that access port rather than a one-off burst.