D-Link DGS-3120-24TC - HOL Blocking Prevention

xStack® DGS-3120 Series Managed Switch Web UI Reference Guide
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Figure 6–2 Default Priority Settings window
The fields that can be configured are described below:
Parameter Description
Unit
Select the unit you want to configure.
From Port / To Port
Select the starting and ending ports to use.
Priority
Use the drop-down menu to select a value from 0 to 7.
Click the Apply button to accept the changes made.
802.1p User Priority Settings
The Switch allows the assignment of a class of service to each of the 802.1p priorities.
To view the following window, click QoS > 802.1p Settings > 802.1p User Priority Settings, as show below: