Administrator Guide

Command
History
Version 9.3.0.0 Introduced on the S6000 and Z9000 platforms
Usage
Information
You can configure only service pools 0 and 1 because the Dell Networking OS uses
only these two service pools. The pool, service0, is used for lossy queues and the
pool, service1, is used for lossless (PFC) queues in all the platforms.
You can configure the weight for the WRED average queue size for service1 on the
S6000 Switch, which is the only platform in which PFC is supported for this service
pool. On the Z9000 Switch, only service0 can be configured because it does not
support PFC.
A WRED profile contains a set of attributes, such as the minimum and maximum
threshold values, and the maximum drop rate for the received packets. You can
add or remove WRED parameter configurations for one or more shared service
pools using a single command. The service-pool wred command is similar in
usage and working to the service-class bandwidth-percentage queue-id
command.
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-pool wred green pool0 thresh-1 pool1
thresh-2
Dell(conf) #service-pool wred yellow pool0 thresh-3 pool1
thresh-4
Dell(conf) #service-pool wred weight pool0 11 pool1 4
service-class wred
The mechanism to configure a weight factor for WRED and ECN functionality for backplane ports is
supported on the Z9000 platform. Also, this mechanism to configure a weight for WRED and ECN
functionality for front-end ports is supported on the Z9000 platforms. Create a weighted random early
detection (WRED) profile and ECN functionality per queue granularity for backplane ports, and attach the
WRED profile with a service class. You can enable or disable these parameters for each queue and specify
minimum and maximum buffer thresholds for each color-coding of the packets. Also, you can specify
the maximum drop rate percentage for yellow and green profiles. The per-queue profile configured is
applicable to all the backplane ports.
Z9000
Syntax
[No] service-class wred {green | weight | yellow}{backplane}
{[queue0 number/string] || [queue1 number/string] || [queue2
number/string] || [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
Quality of Service (QoS)
1271