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Small weighting factor values result in a weighted queue length that moves quickly, and more closely
matches the actual queue length. Larger weighting factor values result in a queue length that adjusts
more slowly. If a weighted queue length moves too quickly (small weighting factor), it may result in
dropped packets if the transmit rate rises quickly, but will also recover quickly after the transmit rate
dies off.
If a weighted queue length moves too slowly (large weighting factor), it will allow a burst of traf
fi
c
through without dropping packets, but may result in dropped packets for some time after the actual
transmit rate drops off.
The weighting factor used should therefore be selected carefully to suit the type of traf
fi
c using the
queue.
Using Text Commands
From the command line, use the
qprof
command to con
fi
gure or display the queue pro
fi
les.
To display a queue pro
fi
le enter the following command:
qprof <instance> ?
where
<instance>
is the number of the queue pro
fi
le to be displayed.
To change the value of a parameter use the following command:
qprof <instance> <parameter> <value>
The parameters and values are:
Parameter
Values
Equivalent Web Parameter
maxkbps number Maximum
Kbps
maxth number
WRED
Maximum
Threshold
minkbps number
Minimum
Kbps
minth number
WRED
Minimum
Threshold
mprob
0-100
WRED Maximum Drop Probability (%)
qlen
number
Maximum Packet Q Length
wfact
number
WRED Q Length Weight Factor
For example, to set the maximum throughput for queue pro
fi
le 5 to 10kbps enter the command:
qprof 5 maxkbps 10
