@wolf73 This is how IP address reservation works on Deco: https://www.tp-link.com/en/support/faq/1795/ If you are trying to configure static IP addresses on devices itself, that will not work with...

@MorganC While all Deco models should be compatible with each other, for Deco mesh with X90s I would suggest to add new units from X-series. These are your options: X10, X20, X50, X50-PoE, X55, X60....

@Choggins If all you need from Deco mesh is WiFi coverage, I would recommend to keep Hub in router mode and switch Deco mesh to AP mode. This is how I run Deco mesh at my house with my ISP cable...

@Jonathan85 Try powerline first. I would suggest the following approach: 1. Test to see if powerline link is stable and reasonably fast; 2. Use one of Deco M4 units you already have to see if setup...

@Sybren This may happen when you have mix of Deco units in your Deco mesh: some supporting Connection Preference feature and some not. For this feature to work, all Deco units must support it. If you...

@Panos13 Out of these two options I would prefer Alternative #2. Even if Deco mesh goes down, your wired equipment will keep working. Also, if you need to replace Deco mesh by some other brand of...