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Dell EMC Configuration Guide for the S3100 Series 9.14.2.4

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Create a QoS Policy

There are two types of QoS policies — input and output.

Input QoS policies regulate Layer 3 and Layer 2 ingress traffic. The regulation mechanisms for input QoS policies are rate policing and setting priority values.
  • Layer 3 — QoS input policies allow you to rate police and set a DSCP or dot1p value. In addition, you can configure a drop precedence for incoming packets based on their DSCP value by using a DSCP color map. For more information, see DSCP Color Maps.
  • Layer 2 — QoS input policies allow you to rate police and set a dot1p value.

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.

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