In a message yesterday to the list I reported that I couldn't figure out
how to catch & process *_fast messages generated by a SwitchLincRelay.
I've got a possible fix, and checked it into a branch based off of your
InsteonIP branch. Even though an on_fast or off_fast doesn't make
much sense with a relay, it's still useful for triggering other
behavior - scenes, timers, etc. And the switch can generate it so it
would be nice if it was supported.
I also sent you a pull request. I figured I'd send it to you because
I'm running your branch and that's where I've tested it.