This counter reports the IPv4 packets dropped from this queue by the WRED (Weighted Random Early Detection) algorithm, a proactive congestion-avoidance mechanism that discards some traffic before the queue actually fills up. It applies to a transmit queue on a subscriber circuit's session where QoS queuing is enabled. It is the 64-bit version of eriRouterQosSubsQueueIPv4WredDroppedPkts, used on high-traffic subscriber circuit queues where a 32-bit counter could wrap between polls. Discontinuities in the value can occur when the management system re-initializes, so a sudden reset does not necessarily mean the underlying activity stopped.