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Link scheduler configuration task list 108
OnSite 2800 Series User Manual 8 • Link scheduler configuration
Defining random early detection
The command
random-detect is 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
Discarding Excess Load
The command
police controls traffic arriving in a queue for class name. The value of the first argument aver-
age-kilobits defines the average permitted rate in kbps, the value of the second argument kilobits-ahead defines
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]#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.
Command Purpose
node(src)[name]#police average-kilobits
burst-size kilobits-ahead
Defines how traffic arriving in a queue for the selected
class or policy name has to be controlled. The value aver-
age-kilobits for average rate permitted is in the range
from 0 to 10000 kbps. The value kilobits-ahead for burst
size tolerated ahead of schedule is in the range from 0 to
10000.