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QOS on 871 for incoming traffic ?

Hi all, I have Cisco 871 router with IOS image c870-advipservicesk9-mz.124-15.T5.bin.

I have SDSL connection 256k/256k.

I want to enable QOS. I made the configuration below:

!

class-map match-any web-class

match protocol http

class-map match-any ping-class

match protocol icmp

class-map match-any torrent-class

match protocol bittorent

!

policy-map child

class ping-class

priority percent 70

class web-class

bandwith remaining percent 50

class torrent-class

bandwith remaining percent 20

!

policy-map parent

class class-default

shape average 256000

service-policy child

!

int fastEthernet 4

bandwith 256

ip nbar protocol-discovery

service-policy output parent

!

Everythink works fine for upload traffic, but when i start download torrent or open pages trough http, I lose the ping replies.

I give the example whit icmp traffic, but it is the same think for any other type of traffic.

Am I wrong somewhere, or the incoming traffic can not be prioritized?

Thanks in advance!

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