Cisco Catalyst 2950 Command Reference Manual page 245

Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands
Table 2-6
Table 2-6
DSCP Value
0
8, 10
16, 18
24, 26
32, 34
40, 46
48
56
Command Modes
Global configuration
Command History Release
12.1(6)EA2
Usage Guidelines
All the maps are globally defined. You apply all maps to all ports.
If you enter the mls qos trust cos command, the default CoS-to-DSCP map is applied.
If you enter the mls qos trust dscp command, the default DSCP-to-CoS map is applied.
After a default map is applied, you can define the CoS-to-DSCP or DSCP-to-CoS map by entering
consecutive mls qos map commands.
The supported DSCP values are 0, 8, 10, 16, 18, 24, 26, 32, 34, 40, 46, 48, and 56. If the mls qos trust
dscp command is entered and a packet with an untrusted DSCP value is at an ingress port, the packet
CoS value is set to 0.
The switches do not support the dscp-mutation, dscp-switch-priority, ip-prec-dscp, and policed-dscp
Note
options.
Examples This example shows how to define the DSCP-to-CoS map. DSCP values 16, 18, 24, and 26 are mapped
to CoS 1. DSCP values 0, 8, and 10 are mapped to CoS 0.
Switch# configure terminal
Switch(config)# mls qos map dscp-cos 16 18 24 26 to 1
Switch(config)# mls qos map dscp-cos 0 8 10 to 0
This example shows how to define the CoS-to-DSCP map. CoS values 0 to 7 are mapped to DSCP values
8, 8, 8, 8, 24, 32, 56, and 56.
Switch# configure terminal
Switch(config)# mls qos map cos-dscp 8 8 8 8 24 32 56 56
OL-10102-01
shows the default DSCP-to-CoS map:
Default DSCP-to-CoS Map
CoS Value
0
1
2
3
4
5
6
7
Modification
This command was introduced.
Catalyst 2950 and Catalyst 2955 Switch Command Reference
mls qos map
2-215