Already thanks for the reactions!
Normally i use tools like wireshark when there are problems, but in this case there are no problems.
let me explain it otherwise.
The customer has performed some test (ping the camera, and limited the bandwidth) and now he is complaining that the camera is no good. I want to go to the customer and do some test with him (the camera works great (Bosch NBN-498 Dinion2X)) .
The test are going to be done in a test environment (PC -> Camera), so no other networking issues.
But i must be honest, i have no idea how i can test it on a easy way so the customer will understand it