105
qos wred queue table
queue weighting-constant
Use queue weighting-constant to specify an exponent for average queue length calculation for a
queue.
Use undo queue weighting-constant to restore the default.
Syntax
queue queue-id weighting-constant exponent
undo queue queue-id weighting-constant
Default
The exponent for average queue length calculation is 9.
Views
WRED table view
Predefined user roles
network-admin
Parameters
queue-id: Specifies a queue by its ID. The value range for this argument is 0 to 7 or keywords
in Table 30.
w
eighting-constant exponent: Specifies the WRED exponent for average queue length calculation.
The value range for exponent is 0 to 15.
Usage guidelines
The bigger the exponent is, the less sensitive the average queue size is to real-time queue size
changes. The average queue size is calculated using the formula:
Average queue size = previous average queue size × (1-2
-n
) + current queue size × 2
-n
,
where n can be configured with the qos wred weighting-constant command.
Examples
# In WRED table queue-table1, set the exponent for average queue length calculation to 12 for
queue 1.
<Sysname> system-view
[Sysname] qos wred queue table queue-table1
[Sysname-wred-table-queue-table1] queue 1 weighting-constant 12
Related commands
display qos wred table
qos wred queue table
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