Users Guide

The following table lists the default bandwidth weights for each queue, and their equivalent percentage which is derived by
dividing the bandwidth weight by the sum of all queue weights.
Table 70. Default Bandwidth Weights
Queue Default Bandwidth Percentage for 4–
Queue System
Default Bandwidth Percentage for 8–
Queue System
0 6.67% 1%
1 13.33% 2%
2 26.67% 3%
3 53.33% 4%
4 - 5%
5 - 10%
6 - 25%
7 - 50%
NOTE: The system supports 8 data queues.
When you assign a percentage to one queue, note that this change also affects the amount of bandwidth that is allocated to
other queues. Therefore, whenever you are allocating bandwidth to one queue, Dell Networking recommends evaluating your
bandwidth requirements for all other queues as well.
• Assign each queue a bandwidth percentage ranging from 1 to 100%, in increments of 1%.
bandwidth-percentage
Specifying WRED Drop Precedence
You can configure the WRED drop precedence in an output QoS policy.
• Specify a WRED profile to yellow and/or green traffic.
QOS-POLICY-OUT mode
wred
For more information, refer to Applying a WRED Profile to Traffic.
DSCP Color Maps
This section describes how to configure color maps and how to display the color map and color map configuration.
This sections consists of the following topics:
• Creating a DSCP Color Map
• Displaying Color Maps
• Display Color Map Configuration
Creating a DSCP Color Map
You can create a DSCP color map to outline the differentiated services codepoint (DSCP) mappings to the appropriate color
mapping (green, yellow, red) for the input traffic. The system uses this information to classify input traffic on an interface based
on the DSCP value of each packet and assigns it an initial drop precedence of green, yellow, or red
The default setting for each DSCP value (0-63) is green (low drop precedence). The DSCP color map allows you to set the
number of specific DSCP values to yellow or red. Traffic marked as yellow delivers traffic to the egress interface, which will
Quality of Service (QoS) 666