@fivetonsflax@tilde.zone @ricci@discuss.systems We gave some thought to this approach but found it gets very hard to explain something like ARP or selecting the next hop in IP forwarding if you have reduced every forwarding device to a switch. It really matters whether it has an awareness of IP once you get into the details. When we call something a switch, we have left a lot of its behavior unspecified. Note that both Venn diagrams agree that the overall class of devices is "switch" - it's just that we can't leave it at that for the whole book.