Specifications

Waters Network Systems User’s Manual Page 101
PS-2126M-POE
Function name:
D-Type TOS
Function description:
IP TOS Priority affects the TOS fields of the IP header. It has an 8-bit SERVICE TYPE field that
specifies how the datagram should be handled. The field could be divided into the following six
subfields: 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 eight types of priorities corresponding to the 0~7 priority in the
following priority diagram. TOS Delay Priority Mapping works while D-TYPE in TOS field of IP
header of the packets received by the switch is configured.
Parameter description:
TOS Delay Priority Mapping:
Each Priority can select Queue 0 ~ Queue 3. By Default, Priority 0 is mapped to Queue 0,
Priority 1 is mapped to Queue 0, Priority 2 is mapped to Queue 1, Priority 3 is mapped to
Queue 1, Priority 4 is mapped to Queue 2, Priority 5 is mapped to Queue 2, Priority 6 is
mapped to Queue 3, and Priority 0 is mapped to Queue 3.
Figure 5.67 – TOS Delay Mapping