Cisco WS-C3560E-48PD-SF Command Reference - Page 276

mls qos dscp-mutation Chapter 2 Catalyst 3560 Switch Cisco IOS Commands mls qos dscp-mutation Use the mls qos dscp-mutation interface configuration command to apply a Differentiated Services Code Point (DSCP)-to-DSCP-mutation map to a DSCP-trusted port. Use the no form of this command to return the map to the default settings (no DSCP mutation). mls qos dscp-mutation dscp-mutation-name no mls qos dscp-mutation dscp-mutation-name Syntax Description dscp-mutation-name Name of the DSCP-to-DSCP-mutation map. This map was previously defined with the mls qos map dscp-mutation global configuration command. Defaults The default DSCP-to-DSCP-mutation map is a null map, which maps incoming DSCPs to the same DSCP values. Command Modes Interface configuration Command History Release 12.1(19)EA1 Modification This command was introduced. Usage Guidelines If two quality of service (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 quality of service (QoS) administrative domain. With ingress mutation, the new DSCP value overwrites the one in the packet, and QoS handles the packet with this new value. The switch sends the packet out the port with the new DSCP value. You can configure multiple DSCP-to-DSCP-mutation maps on ingress ports. You apply the map only to DSCP-trusted ports. If you apply the DSCP mutation map to an untrusted port, to class of service (CoS) or IP-precedence trusted port, the command has no immediate effect until the port becomes DSCP-trusted. Examples This example shows how to define the DSCP-to-DSCP-mutation map named dscpmutation1and to apply the map to a port: Switch(config)# mls qos map dscp-mutation dscpmutation1 10 11 12 13 to 30 Switch(config)# interface gigabitethernet0/1 Switch(config-if)# mls qos trust dscp Switch(config-if)# mls qos dscp-mutation dscpmutation1 2-244 Catalyst 3560 Switch Command Reference 78-16405-05