Configuring The Dscp-To-Dscp-Mutation Map - Cisco Catalyst 2960 series Configuration Manual

How to Configure QoS
Related Topics
Default DSCP-to-CoS Map, on page 570
Examples: Configuring DSCP Maps, on page 637

Configuring the DSCP-to-DSCP-Mutation Map

If two QoS domains have different DSCP definitions, use the DSCP-to-DSCP-mutation map to translate one
set of DSCP values to match the definition of another domain. You apply the DSCP-to-DSCP-mutation map
to the receiving port (ingress mutation) at the boundary of a QoS administrative domain.
With ingress mutation, the new DSCP value overwrites the one in the packet, and QoS applies the new value
to the packet. The switch sends the packet out the port with the new DSCP value.
You can configure multiple DSCP-to-DSCP-mutation maps on an ingress port. The default
DSCP-to-DSCP-mutation map is a null map, which maps an incoming DSCP value to the same DSCP value.
Beginning in privileged EXEC mode, follow these steps to modify the DSCP-to-DSCP-mutation map. This
procedure is optional.
SUMMARY STEPS
1. configure terminal
2. mls qos map dscp-mutation dscp-mutation-name in-dscp to out-dscp
3. interface interface-id
4. mls qos trust dscp
5. mls qos dscp-mutation dscp-mutation-name
6. end
7. show mls qos maps dscp-mutation
8. copy running-config startup-config
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
mutation1 1 2 3 4 5 6 7 to 0
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
610
Purpose
Enters the global configuration mode.
Modifies the DSCP-to-DSCP-mutation map.
• 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.