Link scheduler configuration task list
83
OnSite Model 3210 User Manual
7 • 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.
