New to me RT-AX68U - Devices connected to Wi-Fi but can't reach Internet

[fastoy]

I have a brand new RT-AX68U (upgraded from out of the box 3.0.0.4.386_42095 to 3.0.0.4.388_21732 without reset) replacing RT-AC68R. I have a simple network. RT-AC68R was rock solid but getting old. Since turning up RT-AX68U I have had nothing but problems with a variety of devices. I was running the default Smart Connect with a single SSID (5Ghz and 2.4Ghz) and a guest network of 2.4Ghz. After some work, I have all the IoT devices on 2.4Gh working but barely, e.g. when I rebooted RT-AX68U to install 3.0.0.4.388_21732, I had to reset my Kasa KD110 doorbells. My iPhones (13 Mini and 14 Pro MAC 7C:EC:B1:C0:68:8B) will reconnect to Wi-Fi when returning home but can't see the Internet. To get them back working, I have to turn off cellular and Wi-Fi and turn both back on. Or I can switch to the guest network and switch back. I have turned off Smart Connect and Universal beamforming (see https://www.snbforums.com/threads/a...opping-disappearing.76091/page-11#post-804140) with no change.

I have attached my syslog.

Here are the configuration changes I've made:
Local IP address 172.17.2.1
Lease time: 10080 (7 days)
DNS1 8.8.8.8
DNS2 8.8.4.4
uPnP disable
WPS disable
Smart Connect - Off
Traffic Analyzer - Statistic - On
Universal beamforming: disable

This shouldn't be rocket science.

 

[L&LD]

Flashing from the 386.xxx base firmware to 388.xxx is an excellent reason to reset the router fully.

Using SmartConnect isn't. Turn it off.

Toggling settings on/off isn't the same thing as leaving them off in the first place. Another reason why performing a full reset to factory defaults is usually the fastest way back to a stable router/network.

[Wireless Router] When Standard Reset Isn’t Working: Hard Factory Reset - Models list | Official Support | ASUS USA

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[bennor]

I have a brand new RT-AX68U (upgraded from out of the box 3.0.0.4.386_42095 to 3.0.0.4.388_21732 without reset) replacing RT-AC68R.

Just to clarify, you didn't export a router configuration file from the RT-AC68R and import it into the RT-AX68U did you?

As the previous post suggested, it is probably a good time to do a hard factory reset and reconfigure the router entirely from scratch. Do not import a saved router cfg file. Disconnect any attached USB hard drive(s). Disconnect all connected computers/devices except the one wired computer used to configure the router from scratch.

 

[fastoy]

Just to clarify, you didn't export a router configuration file from the RT-AC68R and import it into the RT-AX68U did you?

As the previous post suggested, it is probably a good time to do a hard factory reset and reconfigure the router entirely from scratch. Do not import a saved router cfg file. Disconnect any attached USB hard drive(s). Disconnect all connected computers/devices except the one wired computer used to configure the router from scratch.

No, I configured the RT-AX68U from scratch. I will do the same after the hard reset.

Thanks to the above posters for the link to the hard reset process.

Did anyone look at my syslog.txt?

 

[fastoy]

I did a hard reset using the above procedure and reconfigured by hand. It made no difference. I fell back to the RT-AC68R and all is well.

The most persistent problem was my iPhones not seeing the Internet even when they were connected to the Wi-Fi. They would see the Internet then after some time, not see the Internet. Generally the other devices worked after some fiddling.

Thanks for the help.