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Class of Service Configuration
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NXA-ENET24 - Software Management Guide
Mapping DSCP Priority
The DSCP is six bits wide, allowing coding for up to 64 different forwarding behaviors. The DSCP replaces
the ToS bits, and 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 the following table. Note that all the DSCP values that are not
specified are mapped to CoS value 0.
Mapping DSCP Priority - Web
Click Priority, IP DSCP Priority. Select a port or trunk from the Interface field. Select an entry from the DSCP
table, enter a value in the Class of Service Value field, then click Apply.
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
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.
IP DSCP settings apply to all interfaces.
FIG. 166 Web - Mapping IP DSCP Priority Values
Mapping specific values for IP Precedence is implemented as an interface
configuration command, but any changes will apply to the all interfaces on the switch.