Administrator Guide

NOTE: When changing a "service-queue" conguration in a QoS policy map, all QoS rules are deleted and re-added
automatically to ensure that the order of the rule is maintained. As a result, the Matched Packets value shown in the
show qos statistics command is reset.
NOTE: To avoid issues misconguration causes, Dell Networking recommends conguring either DCBX or Egress QoS
features, but not both simultaneously. If you enable both DCBX and Egress QoS at the same time, the DCBX
conguration is applied and unexpected behavior occurs on the Egress QoS.
Creating an Input QoS Policy
To create an input QoS policy, use the following steps.
1. Create a Layer 3 input QoS policy.
CONFIGURATION mode
qos-policy-input
Create a Layer 2 input QoS policy by specifying the keyword layer2 after the qos-policy-input command.
2. After you create an input QoS policy, do one or more of the following:
Conguring Policy-Based Rate Policing
Setting a DSCP Value for Egress Packets
Setting a dot1p Value for Egress Packets
Conguring Policy-Based Rate Policing
To congure policy-based rate policing, use the following command.
• Congure rate police ingress trac.
QOS-POLICY-IN mode
rate-police
Setting a DSCP Value for Egress Packets
You can set the DSCP value for egress packets based on ingress QOS classication.
The 6 bits that are used for DSCP are also used to identify the queue in which trac is buered.
Example of Setting a DSCP Value for Egress Packets
Dell#config
Dell(conf)#qos-policy-input my-input-qos-policy
Dell(conf-qos-policy-in)#set ip-dscp 34
Dell(conf-qos-policy-in)#show config
!
qos-policy-input my-input-qos-policy
set ip-dscp 34
Dell(conf-qos-policy-in)#end
Dell#
Setting a dot1p Value for Egress Packets
To set a dot1p value for egress packets, use the following command.
• Set a dot1p value for egress packets.
QOS-POLICY-IN mode
set mac-dot1p
Quality of Service (QoS)
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