Draytek P2260 User Manual
VigorSwitch P2260 User’s Guide
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Function name:
TOS Reliability Priority Mapping
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 Reliability
Priority Mapping works while R-TYPE in TOS field of IP header of the packets received
by the switch is configured.
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 Reliability
Priority Mapping works while R-TYPE in TOS field of IP header of the packets received
by the switch is configured.
Parameter description:
Queue:
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.
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.