[c-nsp] QoS Policing Question - Different Contention Ratio

[Cisco Boy]

Hi Guys,
I have a scenario where I need to distribute the total Internet 
bandwidth into 3 classes and in different data rate.


((Internet))------10mbps/Ethe-------|7204(SPimage)|----Giga---------L2-Switch---------Residential 
customers (20:1 bandwidth 5 megs)
                                                                                             
|----------------- Business customers (5:1 bandwidth 3 megs)
                                                                                             
|------------------ Gold customers (1:1 bandwidth 2 megs).
<----------------------------------------------ISP Datacenter----->    
         <------------------------------Customer 
site------------------------------------>


So total bandwidth is 10 megs coming into the LNS-7204, from there I 
want to create 3 type of poolw/traffic class.

1) The first bandwidth poo is residential customers, they should be 
allocate total bandwidth of 5 megs. That 5 megs will be share among 
residential customers in 20:1 contention ration. For example 20 customer 
would have connection with 5 megs  shared but each should get 5megs/20= 
250 kbps guaranteed plus the bursting should be allowed if someone in 
the same class is not using the bandwidth.

2) Same rule applies to the business and gold customers.

3) I am using 7200 as a PPPoE LNS. all PPPoe clients terminate their 
session there. How can I integrate this with different customers and 3 
different bandwidth pool?

Thanks
CiscoBoy