Consolidated Platform Configuration Guide, Cisco Ios Release 15.2(4)E (Catalyst 2960-X Switches - Cisco Catalyst 2960 series Configuration Manual

DETAILED STEPS
Command or Action
Step 1
configure terminal
Example:
Switch# configure terminal
Step 2
mls qos map dscp-mutation
dscp-mutation-name in-dscp to out-dscp
Example:
Switch(config)# mls qos map
dscp-mutation
gigabitethernet1/0/2-mutation
10 11 12 13 to 30
Step 3
interface interface-id
Example:
Switch(config)# interface
gigabitethernet1/0/2
Step 4
mls qos trust dscp
Example:
Switch(config-if)# mls qos trust dscp
Step 5 mls qos dscp-mutation dscp-mutation-name
Example:
Switch(config-if)# mls qos dscp-mutation
gigabitethernet1/0/2-mutation
Step 6
end
Example:
Switch(config-if)# end
Purpose
Enters the global configuration mode.
Modifies the DSCP-to-DSCP-mutation map.
The default DSCP-to-DSCP-mutation map is a null map, which maps
an incoming DSCP value to the same DSCP value.
• For dscp-mutation-name, enter the mutation map name. You can
create more than one map by specifying a new name.
• For in-dscp, enter up to eight DSCP values separated by spaces.
Then enter the to keyword.
• For out-dscp, enter a single DSCP value.
The DSCP range is 0 to 63.
Specifies the port to be trusted, and enter interface configuration mode.
Valid interfaces include physical ports.
Configures the ingress port as a DSCP-trusted port. By default, the port
is not trusted.
Note
Applies the map to the specified ingress DSCP-trusted port.
For dscp-mutation-name, specify the mutation map name created in
Step 2.
You can configure multiple DSCP-to-DSCP-mutation maps on an ingress
port.
Note
Returns to privileged EXEC mode.

Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)

To return a port to its non-trusted state, use the no mls qos
trust interface configuration command.
To return to the default DSCP-to-DSCP-mutation map values,
use the no mls qos map dscp-mutation dscp-mutation-name
global configuration command.
How to Configure QoS
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