Create A Qos Policy - Dell S3048-ON Configuration Manual

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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

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.

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.

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.

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.

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

Quality of Service (QoS)

Flag Port Port

23.64.0.5/32 0.0.0.0/0 20

23.64.0.2/32 0.0.0.0/0 10

23.64.0.3/32 0.0.0.0/0 12

0.0.0.0/0 14

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