The maximum latency acceptable for a reserved flow packet. This parameter limits the amount of unreserved data that the link scheduler can put onto the driver transmit ring. When the data on the transmit ring reaches a size where additional unreserved data would take longer than the value of this parameter to clock out, no more data will be enqueued. Reduce this parameter to obtain better delay characteristics for reserved flows, but note that this will result in somewhat reduced overall throughput. Units are milliseconds.