172.23.70.0/16 network
In DHCP settings, ip range, it won't accept 172.23.70.170 as beginning of ip range.
Says ip is invalid. I have tried a factory reset, but this still happens.
You realize that a /16 network is 65,536 potential hosts! Also, the proper CIDR notion for that network is 172.23.0.0/16. While 172.23.70.170 should be valid within that range, I assuming it's complaining because your network notation is invalid.
The current range is 172.23.0.1 to 172.23.255.254. Even when I don't alter those and just want to turn on manual ip addressing it says that 172.23.0.1 is not valid. Yes I know the cidr notation is that the like that, I forgot.
Following along as I had a similar issue with a AC86U. Few software revisions back now, but found it odd at the time.
For myself, I wanted to choose a network that was not too common to avoid conflicts when using VPN, so I tried setting the router for 192.168.205.0/24, but the router stated that the IP address was not valid. In fact, the router refused to accept anything above 200. Was kind of dumbfounded at the time.
I tried using 192.168.54.0/24, the default ip range for dhcp isn't even considered valid. 192.168.54.1 is not valid it says. Tried 10.0.0.0/8, says 10.0.0.1 not valid.