R211x-HP Flexfabric 11900 ACL and QoS Command Reference

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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 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-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 in the range of 0 to 7.
weighting-constant exponent: Specifies the WRED exponent for average queue length calculation, in the
range of 1 to 15.
Usage guidelines
The greater 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