C
LASS
OF
S
ERVICE
C
ONFIGURATION
3-213
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 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 a CoS value to the selected DSCP
Priority 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.
Table 3-14. 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