I had this posted over in this thread: https://www.snbforums.com/threads/force-lan-port-4-to-use-the-guest-network-for-asus-merlin-rt-ac68u.18969/ but perhaps this is a better place to post it.
This morning, I upgraded from 380.64_2 to 380.65 and lost connectivity with the router. I flashed...