H3C S6812 Series Command Reference Manual page 1617

Usage guidelines
You cannot delete a WRED table in use. To delete it, first remove it from the specified interface.
You can use the display qos wred table command to display the default WRED table, which cannot
be modified or deleted.
Examples
# Create a queue-based WRED table named queue-table1.
<Sysname> system-view
[Sysname] qos wred queue table queue-table1
[Sysname-wred-table-queue-table1]
Related commands
display qos wred table
queue
Use queue to configure the drop-related parameters for a queue in the queue-based WRED table.
Use undo queue to restore the default.
Syntax
queue queue-id
[ discard-probability discard-prob ]
undo queue { queue-id | all }
Default
The lower limit is 100, the upper limit is 1000, and the drop probability is 10%.
Views
WRED table view
Predefined user roles
network-admin
Parameters
all: Specifies all queues.
queue-id: Specifies a queue by its ID. The value range for this argument is 0 to 7.
drop-level drop-level: Specifies a drop level. This argument is a consideration for dropping packets.
The value 0 corresponds to green packets, the value 1 corresponds to yellow packets, and the value
2 corresponds to red packets. If you do not specify a drop level, the subsequent configuration takes
effect on the packets in the queue regardless of the drop level.
low limit low-limit: Specifies the lower limit for the average queue length. The value range for
low-limit is 0 to 1536.
high-limit high-limit: Specifies the upper limit for the average queue length. The upper limit must be
greater than the lower limit. The value range for high-limit is 0 to 1536.
discard-probability discard-prob: Specifies the denominator for drop probability calculation. The
greater the denominator, the smaller the calculated drop probability. The value range for
discard-prob is 0 to 100.
Usage guidelines
When the average queue size is smaller than the lower threshold, no packet is dropped. When the
average queue size is between the lower threshold and the upper threshold, the packets are
[ drop-level drop-level ] low-limit
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low-limit high-limit high-limit