3com 3CRUS2475 Manuale Utente

The qos dscp-mutation Global Configuration mode command applies 
the DSCP Mutation map to a system  DSCP trusted port. To restore the 
trust state with no DSCP mutation, use the no form of this command.

qos dscp-mutation 

no qos dscp-mutation 

This command has no default configuration.

Global Configuration mode.

The DSCP to DSCP mutation map is applied to a port at the boundary of 
a Quality of Service (QoS) administrative domain.

If two QoS domains have different DSCP definitions, use the DSCP to 
DSCP mutation map to match one set of DSCP values with the DSCP 
values of another domain.

Apply the DSCP to DSCP mutation map only to ingress and to 
DSCP-trusted ports. Applying this map to a port causes IP packets to be 
rewritten with newly mapped DSCP values at the ingress ports.

If the DSCP to DSCP mutation map is applied to an untrusted port, class 
of service (CoS) or IP-precedence trusted port, this command has no 
immediate effect until the port becomes DSCP-trusted.

The following example applies the DSCP Mutation Map to system DSCP 
trusted ports.

The qos map dscp-mutation Global Configuration mode command 
modifies the DSCP to DSCP mutation map. To restore the default DSCP to 
DSCP mutation map, use the no form of this command.

Console(config)# qos dscp-mutation