Stopping and then restarting wasn't working as expected. It defaulted back to PING whereas it ought to have saved the previous method and retried that. So it needed a new parameter to the creation function of Graph.
This is a private blog about setting up and designing a Denial of Service Testing Framework (DOSTF). It consists of a set of C-tools for launching DDoS attacks and monitoring their effects on various platforms. The DDoS attack tools are only designed for experimental purposes and won't work outside of a laboratory. They are also not generally available.