class-map match-all dscp12
 match dscp af12
class-map match-all dscp14
 match dscp af13
class-map match-all dscp26
  match  dscp af31 
class-map match-all dscp28
  match  dscp af32 
class-map match-all prec3
  match ip precedence 3 
policy-map test
  class dscp12
  class dscp14
  class dscp26
  class dscp28
  class prec3
interface FastEthernet0/0
 service-policy input test