H3C S6550X-HI Series Command Reference Manual page 2204

Related commands
display qos wred table
queue
Use
queue
Use
undo queue
Syntax
queue queue-id [ drop-level drop-level ] low-limit low-limit high-limit
high-limit [ discard-probability discard-prob ]
undo queue { queue-id [ drop-level drop-level ] | all }
Default
The lower limit is 100, the upper limit is 1000, and the drop probability denominator is 10.
Views
WRED table view
Predefined user roles
network-admin
Parameters
: Specifies all queues.
all
: Specifies a queue by its ID. The value range for this argument is 0 to 7.
queue-id
drop-level drop-level
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
for
low-limit
high-limit high-limit
must be greater than the lower limit. The value range for
discard-probability discard-prob
calculation. The greater the denominator, the greater the calculated drop probability. The value
range for
discard-prob
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
dropped at random. The longer the queue is, the higher the drop probability is. When the average
queue size exceeds the upper threshold, subsequent packets are dropped.
To use tail drop for a queue, set the lower limit and upper limit to the same value.
Examples
# In queue-based WRED table queue-table1, configure the following drop-related parameters for
packets in queue 1:
•
The drop level is 1.
•
The lower limit for the average queue length is 10.
•
The upper limit for the average queue length is 20.
to configure the drop-related parameters for a queue in the queue-based WRED table.
to restore the default.
: Specifies a drop level. This argument is a consideration for dropping
: Specifies the lower limit for the average queue length. The value range
is 0 to 16000.
: Specifies the upper limit for the average queue length. The upper limit
is 0 to 100.
high-limit
: Specifies the denominator for drop probability
50
is 0 to 16000.