DSCP to dot1q mapping in Bridge

Hello,

There Is one switch CSR226 running on v6.41.3.

Traffic with DSCP 46 entering in Ether 17 Interface and getting tagged with inner vlan on the basis of the destination mac-add associated with the interfaces (iVlan1,2,200). and traffic is further QinQ for the external Vlan 500. finally traffic double tagged is going out by bond3 (sfp-sfpplus1) interface.

Requirement: traffic coming with dscp 46 should be marked dot1p 5 value when going out on the bond3/sfp-sfpplus1 interface.

Please provide the configuration if it possible in the bridge case.
Here is the attached topology.
Topology.JPG
Thanks
Sunil