Allied Telesis AT-S84 - Manual (Page 266)

Chapter 23: Quality of Service (QoS)
266 Section II: Web Browser Interface
2. To change the egress queue where ingress untagged frames received
on a port are to be stored on the egress port, refer to Table 2 on
page 127. The range is 0 (lowest) to 3 (highest). The default is 0. For
example, if you select 3 for queue 3 for a port, all ingress untagged
packets received on the port are stored in egress queue 3 on the
egress port. (If you perform Step 3 and override the priority level in
ingress tagged packets, this also applies to tagged packets as well.)
If the selected port is part of a port trunk, all ports in the trunk are
automatically assigned the same egress queue.
3. To configure a tagged port so that the switch ignores the priority tag in
ingress tagged frames, select Enable from the Override column for the
corresponding port.
The default for this parameter is disabled, meaning that the priority
level of tagged frames is determined by the priority level specified in
the frame itself.
4. Click Apply.
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.