Mapping Ip Precedence; Table 3-11 Mapping Ip Precedence - SMC Networks TigerSwitch SMC8612T2 Management Manual

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ONFIGURING THE

Mapping IP Precedence

The Type of Service (ToS) octet in the IPv4 header includes three
precedence bits defining eight different priority levels ranging from highest
priority for network control packets to lowest priority for routine traffic.
The default IP Precedence values are mapped one-to-one to Class of
Service values (i.e., Precedence value 0 maps to CoS value 0, and so forth).
Bits 6 and 7 are used for network control, and the other bits for various
application types. ToS bits are defined in the following table.
Priority Level
7
6
5
4
Command Attributes
• IP Precedence Priority Table – Shows the IP Precedence to CoS
map.
• Class of Service Value – Maps a CoS value to the selected IP
Precedence value. Note that "0" represents low priority and "7"
represent high priority.
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Table 3-11 Mapping IP Precedence

Traffic Type
Network Control
Internetwork Control
Critical
Flash Override
Priority Level
3
2
1
0
Traffic Type
Flash
Immediate
Priority
Routine