Administrator Guide

[queue3 number/string] || [queue4 number/string] || [queue5 number/string]
|| [queue6 number/string] || [queue7 number/string]}
Parameters
service-class Define the mapping between the service class and policy-based QoS or routing
wred Specify WRED curve parameters for a queue
green Specify green (low) drop precedence to a queue
weight Specify a weight factor to a queue
yellow Specify yellow (medium) drop precedence to a queue
backplane Specify that the WRED weight and profile configured for each queue apply to
backplane ports
queue 0 to queue
3
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.
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 9.6.0.0 Added support for backplane changes in the Z9000 platform.
Version 9.3.0.0 Introduced on the Z9000 platform.
Usage
Information
You can configure all the data queues. For Z9000, 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-profile thresh-1
Dell(conf-wred) #threshold min 100 max 200 max-drop-rate 40
Dell(conf-wred) #wred-profile thresh-2
Dell(conf-wred) #threshold min 300 max 400 max-drop-rate 80
Dell(conf) #service-class wred green backplane queue5 thresh-1 queue7
thresh-2
Dell(conf) #service-class wred yellow backplane queue1 thresh-2 queue3
thresh-1
Dell(conf) #service-class wred weight backplane queue0 11 queue6 4
queue7 9
service-class wred ecn
Create a service class and assign ECN marking for different queues on backplane ports to the service class. This functionality
can be configured on the Z9000 platforms.
Syntax
[No] service-class wred ecn {backplane} queues-list
Parameters
service-class Define the mapping between the service class and policy-based QoS or routing
wred Associate WRED with ECN to mark packets instead of dropping them
1036 Quality of Service (QoS)