User`s manual

be totally consumed by one priority or traffic class. In that case, you could reserve some portion of
memory for the other values. However, adjusting queue sizes can have serious consequences and
should not be done without careful consideration.
How the Switch handles priority tagged packets
The Switch forwards all packets across the switching fabric based on the priority tag it reads in all incoming
packets. If an incoming packet does not have a tag, the Switch automatically assigns it the lowest priority, Priority
0, as shown here:
The Switch forwards packets onto the network based on the traffic class. the Switch places packets into outgoing
queues by mapping each of the eight incoming priorities to one of four outgoing traffic classes, as shown here.
You can override this automatic activity by changing these configuration settings:
1) the default priorities
2) the default priority to traffic class mapping
2) the priority tag in an incoming packet
Changing the traffic class mapping
As shown in the diagram above, the Switch's default priority to traffic class mapping is:
Priority 0-1 maps to Traffic Class 0
●
Priority 2-3 maps to Traffic Class 1●
Priority 4-5 maps to Traffic Class 2●
Priority 6-7 maps to Traffic Class 3●
You can change this default mapping and assign incoming priorities to any traffic class you desire. An example is
shown here:
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