Installation guide

Class of Service Configuration
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3
CLI – The following example globally enables DSCP Priority service on the switch.
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.
Console(config)#map ip dscp 4-304
Console(config)#end
Console#show map ip dscp 4-305
dscp Mapping Status: Enabled
DSCP COS
---- ---
0 1
1 0
2 0
3 0
.
.
.
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