R3#sh run | b pol
!
class-map match-all dscp12
  match ip dscp af12
!
policy-map Prob11
  class dscp12
   priority percent 25
!
!
interface Serial1/2
 ip address 180.40.7.1 255.255.255.224
 max-reserved-bandwidth 100
 service-policy output Prob11
!