Chapter 4: Quality of Service (QoS)
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One last thing to note is that the CoS feature 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 the Quality of Service feature is disabled. When the
feature is disabled, all tagged packets are stored in the lowest priority
queue of a port.
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