What does a button perform with program traffic? Free software application worth $200:
Ostinato – Network Traffic Generator Component 4. Conveniently produce packets for testing in your GNS3 network.

Ostinato is a package crafter, network web traffic generator and analyzer with a pleasant GUI. Also an effective Python API for network examination automation. Craft and send packets of a number of streams with different procedures at various rates. Consider it as "Wireshark in Reverse".