Setup Guide

Displaying WRED Drop Statistics
To display WRED drop statistics, use the following command.
• Display the number of packets Dell EMC Networking OS the WRED prole drops.
EXEC Privilege mode
show qos statistics wred-profile
Example of the show qos statistics wred-profile Command
DellEMC#show qos statistics wred-profile
Interface Gi 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 prole.
EXEC Privilege mode
show qos statistics egress-queue
Example of show qos statistics egress-queue Command
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
5 UCAST 0 0 0 0 0 0 0 0
6 UCAST 0 0 0 0 0 0 0 0
7 UCAST 322323 0 40697472 97 0 0 0 0
8 MCAST 0 0 0 0 0 0 0 0
9 MCAST 0 0 0 0 0 0 0 0
10 MCAST 0 0 0 0 0 0 0 0
11 MCAST 0 0 0 0 0 0 0 0
12 MCAST 0 0 0 0 0 0 0 0
DellEMC#
Pre-Calculating Available QoS CAM Space
Before Dell EMC Networking OS version 7.3.1, there was no way to measure the number of CAM entries a policy-map would consume (the
number of CAM entries that a rule uses is not predictable; from 1 to 16 entries might be used per rule depending upon its complexity).
Therefore, it was possible to apply to an interface a policy-map that requires more entries than are available. In this case, the system writes
as many entries as possible, and then generates an CAM-full error message (shown in the following example). The partial policy-map
conguration might cause unintentional system behavior.
%EX2YD:12 %DIFFSERV-2-DSA_QOS_CAM_INSTALL_FAILED: Not enough space in L3
Cam(PolicyQos) for class 2 (TeGi 12/20) entries on portpipe 1
710
Quality of Service (QoS)