WaNaWe900Just to share experience, the same happened to two of my RT-AC86U units last time. When the issue started to arise, mostly after the continuous router running duration like about a week or two, i couldn't access the router via neither apps nor web. Everything returned to normal only with the magical restart . Then the duration became shorter and shorter and finally it lost the wifi functionality too and the LEDs became very weak... and then... certified... just right after warranty ended. Normal usage though, i.e. not under high stress or temperature or lots of devices.

Hi ASUSmy blacktubi, I have some questions regarding Guest Network Pro / SDN which need your advice.

Hardware: RT-BE88U (main router), 2x RT-AX86U Pro (wired nodes) as example.

Network:
Home (VLAN 10) - 2.4 & 5 GHz
Guest (VLAN 20) - 2.4 & 5 GHz
IoT (VLAN 30) - 2.4 & 5 GHz

1. Do the VLANs work on the WiFi broadcasted by RT-AX86U Pro nodes?
2. What if I replace these nodes with the non-VLAN-aware models such as the TUF series, will VLAN still work?
3. For network printer connected to IoT network, am I able to access it from Home and Guest networks but not the other way?

Thanks for your help.

Similar issues few months ago.
Might be your possible solution:

No, you can't. I asked the same few months ago and here is the official reply (Item #3).
I have yet to see any new development so far.