Dell S4820T, Configuration Manual

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Default Profile Name Minimum Threshold Maximum Threshold Maximum Drop Rate
wred_fortyg_y 467 4671 50
wred_fortyg_g 467 4671 25
Creating WRED Profiles
To create WRED profiles, use the following commands.
1. Create a WRED profile.
CONFIGURATION mode
wred-profile
2. Specify the minimum and maximum threshold values.
WRED mode
threshold
Applying a WRED Profile to Traffic
After 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 (LSB) of this field (DP) to determine the drop
precedence.
• DP values of 110 and 100, 101 map to yellow; all other values map to green.
• If you do not configure Dell Networking OS to honor DSCP values on ingress (refer to
Honoring DSCP
Values on Ingress Packets ), all traffic defaults to green drop precedence.
• Assign a WRED profile to either yellow or green traffic.
QOS-POLICY-OUT mode
wred
Displaying Default and Configured WRED Profiles
To display the default and configured WRED profiles, use the following command.
• Display default and configured WRED profiles and their threshold values.
EXEC mode
show qos wred-profile
Displaying WRED Profiles
Dell#show qos wred-profile
Wred-profile-name min-threshold max-threshold max-drop-rate
wred_drop 0 0 100
wred_teng_y 467 4671 100
Quality of Service (QoS)
809