Create A Qos Policy - Dell Z9500 Configuration Manual

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In the previous example, the ClassAF1 does not classify traffic as intended. Traffic matching the first match criteria is classified

to Queue 1, but all other traffic is classified to Queue 0 as a result of CAM entry 20419.

When you remove the explicit "deny any" rule from all three ACLs, the CAM reflects exactly the desired classification.

The following example shows correct traffic classifications.

Dell#show cam layer3-qos interface tengigabitethernet 2/49

Port Dscp Proto Tcp

-------------------------------------------------------------------------

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

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Flag Port Port

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Quality of Service (QoS)

Create A Qos Policy - Dell Z9500 Configuration Manual

Create a QoS Policy

Troubleshooting

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