Reference Guide

queue 0 to queue
7
Specify the queue number to which the WRED parameters
apply.
number Enter a weight for the queue as a number in the range of 1
to 15. This parameter applies only if you specify the green or
yellow drop precedence.
string Enter the WRED profile name. It is a string of up to 32
characters. Or use one of the five pre-defined WRED profile
names. Pre-defined Profiles: wred_drop, wred-ge_y,
wred_ge_g, wred_teng_y, wred_teng_. This parameter
applies only if you specify a weight factor.
backplane Specify that the WRED weight and profile configured for
each queue apply to backplane ports.
Default All queues on backplane ports operate in tail-drop (best-effort traffic) mode by
default. There is no default WRED green or yellow profile. The default weight is 0.
Command Modes QOS-POLICY-OUT mode
Command History
Version Description
9.9(0.0) Introduced on the C9010.
9.2.1.0 Introduced on the Z9500 switch.
9.3.0.0 Introduced on the Z9000 platform.
Usage Information You can configure queues 0-7. WRED profile contains a set of characteristics, such
as the minimum and maximum WRED thresholds and the maximum drop rate. You
can add and remove WRED parameters for one or more queues by using the
command in a single line. All of the configured attributes apply to all the backplane
ports and are for each queue. To assign drop precedence to green or yellow traffic,
use this command. If there is no honoring enabled on the input, all the traffic
defaults to green drop precedence.
Example
Dell(conf-wred)#wred thresh-1
Dell(conf-wred)#threshold min 100 max 200 max-drop-rate 40
Dell(conf-wred)#wred thresh-2
Dell(conf-wred)#threshold min 300 max 400 max-drop-rate 80
Dell(conf)#service-class wred green queue5 thresh-1 queue7
thresh-2 backplane
Dell(conf)#service-class wred yellow queue1 thresh-2 queue3
thresh-1 backplane
Dell(conf)#service-class wred weight queue0 11 queue6 4 queue7
9 backplane
service-pool wred
Configure a global buffer pool that serves as a shared buffer accessed by multiple queues when the
minimum guaranteed buffers for a queue are consumed.
The switch supports four global service-pools in the egress direction. Two service pools are used—one
for lossy queues and the other for lossless (priority-based flow control (PFC)) queues. You can enable
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Quality of Service (QoS)