Administrator Guide
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