Setup Guide

Table Of Contents
DSCP is a 6bit field. Dell EMC 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 EMC 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
Example of the show qos wred-profile Command.
DellEMC#show qos wred-profile
Wred-profile-name min-threshold max-threshold max-drop-rate
wred_drop 0 0 100
wred_gig_y 467 4671 100
wred_gig_g 467 4671 50
wred_teng_y 467 4671 50
wred_teng_g 467 4671 25
Displaying WRED Drop Statistics
To display WRED drop statistics, use the following command.
Display the number of packets Dell EMC Networking OS the WRED profile drops.
EXEC Privilege mode
show qos statistics wred-profile
DellEMC#show qos statistics wred-profile
Interface Gi 1/1
Drop-statistic Dropped Pkts
Green 51623
Yellow 51300
Out of Profile 0
DellEMC#
Displaying egressqueue Statistics
To display the number of transmitted and dropped packets and their rate on the egress queues of an interface, use the following
command:
Display the number of packets and number of bytes on the egress-queue profile.
EXEC Privilege mode
show qos statistics egress-queue
DellEMC#show qos statistics egress-queue gigabitethernet 1/10
Interface Gi 1/10
Unicast/Multicast Egress Queue Statistics
Queue# Q# Type TxPkts TxPkts/s TxBytes TxBytes/s DroppedPkts DroppedPkts/s DroppedBytes DroppedBytes/s
-------------------------------------------------------------------------------------------------------------------------
0 UCAST 2005191759 6102 1503896312254 4519906 0 0 0 0
1 UCAST 0 0 0 0 0 0 0 0
2 UCAST 0 0 0 0 0 0 0 0
3 UCAST 0 0 0 0 0 0 0 0
4 UCAST 0 0 0 0 0 0 0 0
658
Quality of Service (QoS)