Chapter 8: Quality of Service (QoS)

One last thing to note is that CoS does not change the priority level in a tagged packet. The packet leaves the switch with the same priority it had when it entered. This is true even if you change the default priority-to- egress queue mappings.

The default setting for Quality of Service is disabled. When the feature is disabled, all tagged packets are stored in the lowest priority queue of a port.

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Section I: Using the Menus Interface

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Allied Telesis AT-S79 manual Quality of Service QoS