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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
9.2.1.0 Introduced on the Z9500 switch.
9.3.0.0 Introduced on the Z9000 platform.
Usage
Information
You can configure all the data queues. For Z9500, you can configure queues 0-3.
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-class wred ecn backplane
Apply ECN marking on backplane port-queues in a service class.
Z9500
Syntax
[no] service-class wred ecn queue-list backplane
1478
Quality of Service (QoS)