Administrator Guide

wred weight
Configure the weight factor for computation of average-queue size. This weight value applies to front-end ports. This mechanism to
configure a weight for WRED and ECN functionality for front-end ports is supported on the S6000 and Z9000 platforms.
Syntax
[no] wred weight number
Parameters
weight Define the weight factor to be used for computation of the WRED average-queue size to
either enable WRED to discard packets or cause ECN to mark packets that exceed the
minimum threshold configured. This setting applies to front-end ports only.
number Enter the weight as a number to be used to calculate the average-queue size. The range
is 1 to 15. The default is 0.
Default The default weight is zero.
Command Modes QOS-POLICY-OUT 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 If the average queue size is more than the maximum threshold of WRED, the packet is dropped. If the average
queue size is between the minimum and maximum threshold values, the decision to drop or queue the packet is
taken based on the packet drop probability. The probability that a packet is dropped depends on the minimum
threshold, maximum threshold, and mark probability denominator.
Example
DellEMC(conf-qos-policy-out) # wred weight 5
wred-profile
Create a WRED profile and name the profile.
Syntax
wred-profile wred-profile-name
To remove an existing WRED profile, use the no wred-profile command.
Parameters
wred-profile-name
Enter your WRED profile name in character format (32 character maximum). Or use one
of the pre-defined WRED profile names. You can configure up to 26 WRED profiles plus
the five pre-defined profiles, for a total of 31 WRED profiles.
Pre-defined Profiles: wred_drop, wred-ge_y, wred_ge_g, wred_teng_y, wred_teng_g.
Defaults The five pre-defined WRED profiles. When you configure a new profile, the minimum and maximum threshold
defaults to predefined wred_ge_g values.
If green profile is applied, default yellow also take effect and vice-versa.
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC
Networking OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
1242 Quality of Service (QoS)