R21xx-HP FlexFabric 11900 ACL and QoS Command Reference

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Views
WRED table view
Predefined user roles
network-admin
Parameters
queue-value: Queue number in the range of 0 to 7.
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 queue 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 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 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