Users Guide

can enable WRED and ECN configuration on the global service-pools. You can define WRED profiles and weight on each of the
global service-pools for both lossy and lossless (PFC) service-pools.
Syntax
[No] service-pool wred {green | weight | yellow} {pool0 number/string|
pool1 number/string}pool0 number/string
Parameters
service-pool 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.
pool0 Service-pool buffer 1 (default service-pool for PFC traffic) .
pool1 Service-pool buffer 0 (default service-pool for both lossy and lossless traffic.
traffic).
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 CONFIGURATION mode
Command
History
Version Description
9.12(1.0) Introduced on the S5048F–ON.
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S6100-ON.
9.8(1.0) Introduced on the Z9100-ON.
9.7(0.0) Introduced on the S6000-ON.
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 EMC 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 only service pool 0. The pool, service0, is used for lossy queues.
You can configure the weight for the WRED average queue size for service1, which is the only the
platform in which PFC is supported for this service pool.
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
DellEMC(conf-wred) #wred thresh-1
DellEMC(conf-wred) #threshold min 100 max 200 max-drop-rate 40
DellEMC(conf-wred) #wred thresh-2
DellEMC(conf-wred) #threshold min 300 max 400 max-drop-rate 80
DellEMC(conf) #service-pool wred green pool0 thresh-1 pool1 thresh-2
Quality of Service (QoS) 1291