User's Manual

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If the Enable Qos checkbox is not selected, all QoS will be disabled for all interfaces.
The default DSCP mark is used to mark all egress packets that do not match any
classification rules.
Queue Config
Choose Advanced Setup > Quality of Service > Queue Config, and the following
page appears.
Figure 90 QoS queue setup
In this page, you can enable, add or remove a QoS rule.