@Alexandre. Well, given that I purchased the Nighthawk non-router version because of my understanding of this being handled by the m9, I think the former option is what I'm going to work with.
@Alexandre. So, it shows you how naive I am. I heard the m9 described as a "router" but apparently this is in context of routing wifi, not LAN traffic. Okay... everyone laugh 🤣 Crap, so even more...