Installation manual

3-229
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Mapping DSCP Priority
The DSCP is six bits wide, allowing coding for up to 64 different forwarding behaviors.
The DSCP retains backward compatibility with the three precedence bits so that
non-DSCP compliant devices will not conflict with the DSCP mapping. Based on network
policies, different kinds of traffic can be marked for different kinds of forwarding. The
DSCP default values are defined in the following table. Note that all the DSCP values that
are not specified are mapped to CoS value 0.
Command Attributes
• DSCP Priority Table – Shows the DSCP Priority to CoS map.
• Class of Service Value – Maps the selected DSCP Priority value a CoS value. Note
that “0” represents low priority and “7” represent high priority.
Note:
IP DSCP settings apply to all interfaces.
Web – Click Priority, IP DSCP Priority. Select an entry from the DSCP table, enter a value
in the Class of Service Value field, then click Apply.
Figure 3-129 Mapping IP DSCP Priority Values
Table 3-20 Mapping DSCP Priority Values
IP DSCP Value CoS Value
00
81
10, 12, 14, 16 2
18, 20, 22, 24 3
26, 28, 30, 32, 34, 36 4
38, 40, 42 5
48 6
46, 56 7