Allied Telesis AT-GS950/8 - Manual (Page 174)

Chapter 12: Quality of Service (CoS)
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Associate DSCP Classes to Egress Queues
If you choose to use the DSCP tags in your Access Control policy
configuration, each DSCP value (0-63) that is relevant to
your configuration needs to be mapped to one of the four egress queues
(0-3). The default queue for all DSCP values is 0.To assign the queue
mappings to the DSCP values, perform the following procedure.
1. From the main menu on the left side of the page, select Bridge.
The Bridge folder expands.
2. From the Bridge folder, select QoS.
The QoS folder expands.
3. From the QoS folder, select DSCP.
The DSCP Class Mapping Page page is shown in Figure 57.
Figure 57. DSCP Class Mapping Page
4. For each DSCP In value that is relevant to your configuration, select a
queue (0-3) in the Queue column.
5. After you have completed this mapping process, click Apply.
6. From the main menu on the left side of the page, select Save
Configuration to Flash to permanently save your changes.