Does anyone know of a traffic generator that can generate or simulate network traffic for example http, ftp, smtp, instant messaging and voice plus video over IP traffic. I need the different traffic profiles to test the impact of security of real-time QoS traffic. If possible the traffic generator will permit for one to chose a bandwidth percentage a profile is to take up.
I have tried numerous ones including iperf, jperf, Ntttcp and the all hog the links bandwidth with one traffic profile. So I'm ideally after a generator with flexibility not a stress testing tool.