class-map match-all dscp26
  match  dscp af31 
class-map match-all dscp24
  match  dscp cs3 
class-map match-all dscp28
  match  dscp af32 
class-map match-all prec3
  match ip precedence 3 
policy-map test
  class dscp24
  class dscp26
  class dscp28
  class prec3
interface FastEthernet0/0
 service-policy input test