Allied Telesis AT-S81 - Manual (Page 126)

Chapter 10: Quality of Service (QoS)
126 Section I: Using the Menus Interface
The following prompt is displayed if you are configuring a port:
Set Traffic Class->Enter port number>
The following prompt is displayed if you are configuring a trunk:
Enter trunk group number>
5. Enter the port or trunk number that you want to configure. You can
configure only one port or trunk at a time.
A prompt similar to the following is displayed:
Enter queue for port n >
6. Enter the egress queue where the ingress untagged frames received
on the port or trunk are to be stored on the egress port. The range is 0
(lowest) to 3 (highest). For example, if you enter 3 for queue 3, then all
ingress untagged packets that are received on the port will be stored in
egress queue 3 on the egress port. The default is 0. (If you perform
Step 7 and override the priority level in ingress tagged packets, this
also applies to those packets as well.)
7. To configure a tagged port or trunk so that the switch ignores the
priority tag in ingress tagged frames, type O to select Set Override
Status to configure a port or K to select Set Trunk Override Status to
configure a trunk.
The following prompt is displayed is you are configuring a port:
Set Priority Queue->Enter port number>
The following prompt is displayed if you are configuring a trunk:
Enter trunk group number>
8. Enter the port or trunk number that you want to configure. You can
configure only one port or trunk at a time.
A prompt similar to the following is displayed:
Enable or Disable override for port n (E/D)>
9. Type E to enable the override or D to disable it.
Note
The tagged information in a frame is not changed as the frame
traverses the switch. A tagged frame leaves a switch with the same
priority level that it had when it entered.