will anyone here help me to write a script to implement AF service class?

[<folke@xxxxxxxx>]

hi ,all 
 
  i am a new commer of this community. :)

  i want to use qdisc GRED to implemnet the AF
service . that is to divide traffic into AF1 
AF2 and AF3 and both have two drop precedencies.
thus i creat three classes ,each have one GRED 
qdisc , but i don;t know how to divide the 
traffic within one class into two drop precedencies.
e.g. i can map both AF11 and AF12 onto class 2:1 
which contains a GRED qdisc , but how can i 
sub-divide the two drop precedency within 
this qdisc ?


any help is appreciated 

Folke


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