Queue Weighting-Constant - HP 6125XLG Command Reference Manual

Usage guidelines
When both the receiver and sender support ECN, the device can notify the peer end of the congestion
status by identifying and setting the ECN flag. ECN avoids deteriorating congestion.
Examples
# In WRED table queue-table1, enable ECN for queue 1.
<Sysname> system-view
[Sysname] qos wred queue table queue-table1
[Sysname-wred-table-queue-table1] queue 1 ecn
Related commands
• display qos wred table
qos wred table
•

queue weighting-constant

Use queue weighting-constant to specify an exponent for average queue length calculation for a
specified queue.
Use undo queue weighting-constant to restore the default.
Syntax
queue queue-value weighting-constant exponent
undo queue queue-value weighting-constant
Default
The exponent for average queue length calculation is 9.
Views
WRED table view
Predefined user roles
network-admin
Parameters
queue-value: Specifies a queue number.
weighting-constant exponent: Specifies the WRED exponent for average queue length calculation, in the
range of 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
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
-n , where n can be configured with the qos wred weighting-constant
90