hi
As you pointed out in QoPPB you can configure/translate the bgp attribute values into either a qos-group or ip-prec.
As metnioned in the link it does contain 3 steps in doing that ...i.e.,
1.creating route map
2.applying the route map to bgp routes transferred
3.enabling per interface packet marking
interface x
bgp-policy |source,destination| ip-prec-map
or
bgp-policy |source,destination| ip-qos-map
do find the 3 rd step which shows how the same is configured/applied on the interfaces..
regds