I recently set up 3  Deco M9 Plus units to provide WiFi coverage around the house.  To do this, I turned WiFi off on my Netgear Modem/Router and connected the main Deco via Ethernet.

I've since found out that my Modem/Router can be used as a Modem Only, which makes sense to me, as then the Deco is the only Router, which I think should help reduce NAT issues and keep things a little cleaner.

Has anyone set up the Deco units in this way?  Do I need to reset the Decos and start the set up process again with the Netgear in Modem Mode?  Does the Deco give me the option to add my broadband username and password, as I'm not sure the modem gives me that option?

Asking for any advice before I go through the process!

Thanks in advance.