Reference Guide

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 Networking OS the WRED profile drops.
EXEC Privilege mode
show qos statistics wred-profile
Example of the show qos statistics wred-profile Command
Dell#show qos statistics wred-profile
Interface Te 1/1/1
Drop-statistic Dropped Pkts
Green 51623
Yellow 51300
Out of Profile 0
Dell#
Displaying egress-queue Statistics
To display the number of transmitted and dropped packets on the egress queues of a WRED-configured
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
Example of the show qos statistics egress-queue Command
Pre-Calculating Available QoS CAM Space
Before Dell 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 configuration 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
The test cam-usage command allows you to verify that there are enough available CAM entries before
applying a policy-map to an interface so that you avoid exceeding the QoS CAM space and partial
Quality of Service (QoS)
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