Administrator Guide

service-pool wred
A global buffer pool that is a shared buffer pool accessed by multiple queues when the minimum guaranteed buffers for the queue are
consumed can be configured on the S6000 and Z9000 platforms.
Create a global buffer pool that is a shared buffer pool accessed by multiple queues when the minimum guaranteed buffers for the queue
are consumed. S4810, S4820T, S6000, and Z9000 platforms support four global service-pools in the egress direction. Two service pools
are used—one for lossy queues and the other for lossless (priority-based flow control (PFC)) queues. You 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
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_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
9.10(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 pool 0. The pool, service0, is used for lossy queues.
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) 1245