Patton electronic 2800 user manual Defining random early detection, Discarding Excess Load

OnSite 2800 Series User Manual 8 • Link scheduler configuration

Defining random early detection

The command random-detectis used to request random early detection (RED). When a queue carries lots of TCP transfers that last longer than simple web requests, there is a risk that TCP flow-control might be ineffi- cient. A burst-tolerance index between 1 and 10 may optionally be specified (exponential filter weight). The no form of this command reverts the queue to default “tail-drop” behavior.

Mode: Source

Command	Purpose
node(src)[name]#random-detect {burst-tolerance}	Defines random early detection (RED) for
	queues of for the selected traffic-class or policy
	name. The range for the optional value burst-
	tolerance is from 1 to 10.

Discarding Excess Load

The command police controls traffic arriving in a queue for class name. The value of the first argument aver- age-kilobitsdefines the average permitted rate in kbps, the value of the second argument kilobits-aheaddefines the tolerated burst size in kbps ahead of schedule. Excess packets are dropped.

This procedure describes defining discard excess load

Mode: Source

Command	Purpose
node(src)[name]#police average-kilobits	Defines how traffic arriving in a queue for the selected
burst-sizekilobits-ahead	class or policy name has to be controlled. The value aver-
	age-kilobitsfor average rate permitted is in the range
	from 0 to 10000 kbps. The value kilobits-aheadfor burst
	size tolerated ahead of schedule is in the range from 0 to
	10000.

Link scheduler configuration task list 108