@meryfd Try using these security settings for both bands: There's a beta FW for Archer C6 which is targeted to improve wireless stability. You can give it a go. With this FW you can disable OneMesh...

@Mike_de Is your "truenas" device set to obtain its IP address by DHCP ? Also make sure that Interface Grouping is correct, i.e. the interface on which the "truenas" is connected is in the default...

@Lewis004 If your router is in AP mode then you can't use the OneMesh feature. See OneMesh FAQ - Q7/A7.

@xarx Your configuration seems fine. The only thing that bothers is the exclamation mark ("poor network") on the AX50 AP - normally you should have the same yellow check-mark as on the main AX50....

@spybutterfly The C50 APs should work with these IP addresses and configured in AP mode. For the RE305 if in RE mode you should follow your user guide to configure it:...

@Sam-eer Watch this video for details on how to do that.