Administrator Guide

Table Of Contents
Applying a WRED Profile to Traffic
After you create a WRED profile, you must specify to which traffic Dell EMC Networking OS should apply the profile.
Dell EMC 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 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
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 Te 1/1/1
Drop-statistic Dropped Pkts
Green 51623
Yellow 51300
Out of Profile 0
DellEMC#
Displaying egress–queue 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 tengigabitethernet 1/4/1/2
Interface Te 1/4/1/2
Unicast/Multicast Egress Queue Statistics
Queue# Q# Type TxPkts TxPkts/s TxBytes TxBytes/s DroppedPkts DroppedPkts/s DroppedBytes DroppedBytes/s
---------------------------------------------------------------------------------------------------------------------------
0 UCAST 0 0 0 0 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 1708252734 2340972 874625399808 1198000301 1357413570 0 694995747840 0
4 UCAST 0 0 0 0 0 0 0 0
5 UCAST 0 0 0 0 0 0 0 0
6 UCAST 0 0 0 0 0 0 0 0
7 UCAST 0 0 0 0 0 0 0 0
8 UCAST 0 0 0 0 0 0 0 0
9 UCAST 1132 1 143063 217 0 0 0 0
10 MCAST 0 0 0 0 0 0 0 0
11 MCAST 0 0 0 0 0 0 0 0
Quality of Service (QoS)
685