This is a Second part of an article I have written some time ago about the great tool called PackETH. This article will be much shorted as it will be focused on the less complicated (but not useful!) modes of the tool.
In the previous par I have described how to build your own packet from L2 to L4 but what if you need something else ? maybe not a single packet but a burst of packets? or what is you need to send multiple streams of various frames ? Well then you need to use the Gen-S and Gen-B modes.