This attribute is migrated to the Lp/n Eng Arc Cqc Ov attribute portCongestionPolicy. This attribute specifies whether port aggregation is turned on or off for this ATM-FP. It applies only to transmit traffic served on the common queues and does not apply to perVc queues. When port aggregation is on, the enqueue decision of cells or frames to a common queue is based upon the congestion state of the entire port to which the queue belongs. A port is defined to be as congested as the most congested queue amongst all its queues: the low, medium and high emission priority queues. Thus, for example, if the low priority queue is congested, the high priority queue will also experience discards even though the high priority queue may itself not be congested. Setting port aggregation on assures that the low priority queues are also serviced in the event of congestion. When the value of this attribute is set to off, the enqueue decision of cells or frames to a common queue is based solely upon the congestion state of that queue, not the port. This setting assures that the absolute priority of the traffic is taken into account, regardless of whether or not the lower priority queues are being served.