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CBWFQ not worked anymore?

Hello,

I have a little project about CBWFQ on cisco router 2900 series for voip traffic.

Here what i did:

Interface gigabitethernet 0/1

Speed 10

 

Class map voip

Match protocol sip

Match protocol rtp

 

Policy map CBWFQ

class voip

Bandwidth 500

Queue-limit 500 bytes

Class class-default

Queue-limit 500 bytes

 

Interface g0/0

Service-policy output CBWFQ

 

And then i tried to generate 80Mbps udp traffic using traffic generator from input g0/1 to output g0/0. Last time i did that, it succed to increase the qos level (especially for the packet loss).

But when i tried to do that again yesterday, it seemed like it didnt work. 

Is there something missing? Please help me.

Thank you.

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