Cisco Catalyst 2950 Command Reference Manual page 120

mls qos map
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.
Note The switches do not support the dscp-mutation, dscp-switch-priority, ip-prec-dscp, and policed-dscp
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
You can verify your settings by entering the show mls qos maps privileged EXEC command.
Related Commands Command
mls qos cos
mls qos trust
show mls qos maps
Catalyst 2950 Desktop Switch Command Reference
2-96
Description
Defines the default CoS value of a port or assigns the default CoS to
all incoming packets on the port.
Configures the port trust state.
Displays quality of service (QoS) mapping information.
Chapter 2 Cisco IOS Commands
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