Well, this is embarrassing...
First, to answer DarkKnight75 - at least a half dozen tries.
Beta 2 on my AX86U is working and it probably was working the first time I upgraded. I was using my desktop which is connected to the LAN port 1 to flash and configure. The last time I flashed beta 2 and factory reset with new config I still did not have connection to the Internet from the desktop. I tried speed test on the router and it worked. So I fired up the Mac Mini which is wireless and, voila, it connected to Internet sites! What the h***? Switched the Ethernet cable over to LAN port 4 and guess what? CONNECTION! Yea!!! I dug up another CAT5e cable and connected the desktop back to LAN port 1 and all is good. I have a NAS and a PoE switch on two other ports and they were not bothered.
Guess I can blame this on gremelins or maybe mischievous Christmas elves.
Happy Holidays to all wherever you hang your hat.
Please be safe. “It's a dangerous business, Frodo, going out your door. You step onto the road, and if you don't keep your feet, there's no knowing where you might be swept off to.”