The default weighted tail drop (WTD) threshold for queue 1 is 400 percent. To configure the WTD thresholds, you should issue the mls qos queues-et output threshold command. The syntax of the mls qos queue-set output threshold command is mls qos queue-set output qset-idthreshold [queue-id] drop-threshold1 dropthreshold2 reserved-threshold maximum-threshold.

The two drop thresholds are expressed as a percentage of the allocated memory of the queue. The reserved threshold is the percentage of allocated memory that is guaranteed for the queue. The maximum threshold is the maximum queue memory before packets are dropped.