The final field we have left is the application data field. That way I can see this information when it shoots by in a packet analyzer. This becomes very handy if you're involved with IT network verification test teams. Pumping traffic into your network requires a router that supports PGM multicast. You'll also need a traffic generator, at one end of the spectrum there's open source, Linux, and at the far extreme there are expensive turnkey solutions.
Many tools are available for hacking IP packets.
Keeping the interface GUI free allows scripts to interface to command-line execution such as on Linux terminal window. The IP protocol number for PGM is 113. You'll need to provide layer 2 and 3 information and multicast addresses as well. The netstat utility should be useful for finding your Mac address. If money is no object, try IXIA or Cisco's Network Verification Tool .