User`s guide

Signamax 

 065-7726SPOE / 065-7726SPOE-FP 24-Port 10/100BaseT/TX
PoE Managed Switch User Manual
Publication date: February 2010
Revision A1.0
140
Function name:
M-Type TOS
Function description:
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:
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.
Fig. 3-71