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3.19.7 M-Type TOS
IP TOS Priority affect TOS fields of IP header, you can find it has 8-bit SERVICE TYPE field that specifies how
the datagram should be handled. The field could be divided into six subfields as follows, PRECEDENCE (3
bits), D-Type (Delay Priority, 1 bit ), T-Type (Throughput Priority, 1bit), R-Type (Reliability Priority, 1bit ),
M-Type (Monetary Cost Priority, 1bit ), and UNUSED. PRECEDENCE 3-bits can arrange 8 kinds of priorities
corresponding to the 0~7 priority in the following priority diagram. TOS Monetary Cost Priority Mapping works
while M-TYPE in TOS field of IP header of the packets received by the switch is configured.
Parameter description:
y
TOS Monetary Cost Priority Mapping:
Each Priority can select any of Queue 0 ~ Queue 3. In Default, Priority 0 is mapping to Queue 0, Priority 1
is mapping to Queue 0, Priority 2 is mapping to Queue 1, Priority 3 is mapping to Queue 1, Priority 4 is
mapping to Queue 2, Priority 5 is mapping to Queue 2, Priority 6 is mapping to Queue 3, and Priority 0 is
mapping to Queue 3.
