Reference Guide

Quality of Service (QoS) | 733
Create WRED Profiles
To create a WRED profile:
1. Create a WRED profile using the command
wred from CONFIGURATION mode.
2. The command
wred places you in WRED mode. From this mode, specify minimum and maximum
threshold values using the command
threshold.
Applying a WRED profile to traffic
Once you create a WRED profile you must specify to which traffic Dell Networking OS should apply the
profile.
Dell Networking OS assigns a color (also called drop precedence)—red, yellow, or green—to each packet
based on it DSCP value before queuing it. DSCP is a 6 bit field. Dell Networking uses the first three bits of
this field (DP) to determine the drop precedence. DP values of 110 and 100 map to yellow, and all other
values map to green. If you do not configure Dell Networking OS to honor DSCP values on ingress
(Honoring DSCP values on ingress packets on page 728) see all traffic defaults to green drop precedence.
Assign a WRED profile to either yellow or green traffic from QOS-POLICY-OUT mode using the
command
wred.
Displaying Default and Configured WRED Profiles
Display default and configured WRED profiles and their threshold values using the command show qos
wred-profile
from EXEC mode, as shown in Figure 40-11.
wred_teng_g 467 4671 50
wred_fortyg_y 467 4671 50
wred_fortyg_g 467 4671 25
Table 40-6. Pre-defined WRED Profiles for the S5000
Default Profile
Name
Minimum
Threshold
Maximum
Threshold
Maximum
Drop Rate