Vigitron MaxiiNet Vi30126 Series, Operation Manual

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NOTE:
TCP/UDP uses port number 0-65536, however only the
port numbers of 0 to 1024 are use for what are called privilieged
services which the most commonly used.
More than one can be selected. In that case the switch will arrange the
packet to the assigned queue in the following priority:

TCP/UDP port number

IP ToS/DS

802.1p priority tag

802.1p physical port
NOTE:
TCP/UDP will over ride all other settings.
If 802.1p priority tag is use the following 802.1 field will be used to set the
priority queue:

Priority Fields 4,5,6, and 7 are High Priority

Priority Fields 0,1,2, and 3 are Low Priority

For IP TOS/DS priority, there are 7 kinds of TOS field can be
assigned to High or Low queues. i.e; 6’b101110, 6’b001010,
6’b010010, 6’b011010, 6’b100010, 6’b110000 and 6’b111000.

Setting each will define the ratios applied, however the order of
priority will remain as:

TCP/UDP>TOS/DS>802.1p>Physical