Administrator Guide

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
ecn Cause explicit congestion notification (ECN) to be used to
indicate network congestion, rather than dropping packets,
queues-list Enter the queue numbers, either as individual
queue numbers separated by commas or as an inclusive list
separating the starting and ending queue numbers with a
hyphen
1358
Quality of Service (QoS)