I just received the Google WiFi mesh (2 units) from Google to replace the old Google Fiber router. Since the old Google router was so horrible I bought a new TP-Link AX3000 Gigabit Wi-Fi 6 Router, Archer AX50 and have connected it to the old Google Fiber router via ethernet cable (after turning off the WiFi in the old Google Fiber router).I also have an access point, AC1750 Wi-Fi Range Extender, RE450.
My house is over 3000sq.ft. so I'm trying to figure out if I can use all of these together to allow for better WiFi experience. Any assistance would be appreciated.
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Well, if you have some time this weekend, you might crack open that Google WiFi system and set it up instead of the TP-Link system (just turn off the TP-Link system and disconnect it from your internet service; you can use the same network name and password as your TP-Link system so your devices all connect automatically). Follow the recommended placement advice as much as you possibly can – put the primary as close to the center of your home as possible with the secondaries one or two rooms away from the primary (in any direction). They should all have "great" mesh test results. From there they will provide 2.4GHz and 5GHz coverage to more distant clients. Don't put a secondary where your clients are already struggling to get coverage – that won't help (and that advice applies to the extender in your TP-Link system).
Then you can see if it ends up working better than what you have now or not. I still wouldn't try to use both at the same time.
I think I'm screwed either way. My router connection to the Google Fiber ethernet access is on the second floor. That is where the router will need to be. My current TP-Link router is on the second floor with an additional access point (TP-Link AC1750 WiFi Extender (RE450)) is located on the main floor. My basement does not have an extender and it receives very poor coverage, about 50 - 90mb down and 50 - 90mb up. I don't see how I can place the access points within a couple of rooms of each other and get the coverage I need throughout my house.
It sounds like you may need to start thinking about running some Ethernet. One run to get the primary on a middle floor would be a big improvement, since you'd be able to put one secondary on the second floor and another in the basement. But, in a big home (or one with more dense construction materials like concrete, brick, or plaster), you might want to consider running Ethernet from the primary to the secondaries. This lets them be placed further from the primary (since they no longer rely on the 5GHz mesh interconnect). I know that may be daunting, but in a large home, WiFi alone may not be sufficient to get reliable coverage everywhere you need it. Note that if you have coaxial cabling in place, you may be able to use MoCa adapters to create an Ethernet equivalent without running new wires.