Users Guide

Output QoS policies regulate egress traffic. The regulation mechanisms for output QoS policies are bandwidth percentage, scheduler
strict, rate shaping and WRED.
NOTE: When changing a "service-queue" configuration in a QoS policy map, all QoS rules are deleted and re-added
automatically to ensure that the order of the rules is maintained. As a result, the Matched Packets value shown in the show
qos statistics command is reset.
NOTE: To avoid issues misconfiguration causes, Dell Networking recommends configuring either DCBX or Egress QoS features,
but not both simultaneously. If you enable both DCBX and Egress QoS at the same time, the DCBX configuration 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:
Configuring Policy-Based Rate Policing
Setting a dot1p Value for Egress Packets
Configuring Policy-Based Rate Policing
To configure policy-based rate policing, use the following command.
• Configure rate police ingress traffic.
QOS-POLICY-IN mode
rate-police
Setting a dot1p Value for Egress Packets
To set a dot1p value for egress packets, use the following command.
• Set a dscp or dot1p value for egress packets.
QOS-POLICY-IN mode
set mac-dot1p
Constraints
The systems supporting this feature should use only the default global dot1p to queue mapping configuration as described in Dot1p to
Queue Mapping Requirement.
Creating an Output QoS Policy
To create an output QoS policy, use the following commands.
1 Create an output QoS policy.
Quality of Service (QoS)
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