Configuring the ECN330-switch
338 1553-KDU 137 365 Uen D 2006-06-16
6.14.2.4 Mapping DSCP Priority
The DSCP is six bits wide, allowing coding for up to 64 different forwarding
behaviors. The DSCP replaces the ToS bits, but it retains backward compatibility
with the three precedence bits so that non-DSCP compliant, ToS-enabled
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 Table 21. Note that all the DSCP values that
are not specified are mapped to CoS value 0.
Table 21 Mapping DSCP Priority
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.
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
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