Mapping Ip Precedence; Table 3-13 Mapping Ip Precedence; Figure 3-89 Ip Precedence/Dscp Priority Status - SMC Networks SMC8126L2 Management Manual

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Configuring the Switch
Web – Click Priority, IP Precedence/DSCP Priority Status. Select Disabled,
IP Precedence or IP DSCP from the scroll-down menu, then click Apply.
CLI – The following example enables IP Precedence service on the switch.
Console(config)#map ip precedence
Console(config)#

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 Traffic Type
7 Network Control
6 Internetwork Control
5 Critical
4 Flash Override
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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Figure 3-89 IP Precedence/DSCP Priority Status

Table 3-13 Mapping IP Precedence

Priority Level Traffic Type
3 Flash
2 Immediate
1 Priority
0 Routine
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