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I wanted my desktop machine to be able to cast via Google Cast to my Chromecast Audio - the desktop is cabled, and the Chromecase is wifi... without them on the same network they couldn't see each other.
I solved this by putting a wi-fi card in my desktop :)
It was £25 - would be less than that for a PCI Wi-Fi card too normally, but my hackintosh needed a specific card for the Wi-Fi to work as native in OSX.
My approach has been to connect everything via Wi-Fi to the Unifi UAP Lite. I like this approach cos it's cheaper...
No. Not for that.
But if you have a NAS and store lots of local media or photos that you process on a laptop, etc... then the difference between falling back to 100Mbps ethernet and 1Gbps is pretty noticeable.
If you're just clients for internet services, this is not an issue as your internet connection is already the weakest link in bandwidth speed.
Networks may not be visible to each other... and perhaps for you this is fine (if you're all just clients of internet services).
The issues I came across:
Note: This issue only arises if you're putting your router in modem mode and then using the EdgeMax as your router, and you also want to use hardware rather than software routing... in this circumstance, the EdgeMax treats every port as a distinct network and they cannot see each other. Using a PoE switch (like the ToughSwitch) behind the EdgeMax and running WiFi from the ToughSwitch solves all of this... as it all gets the same DHCP IP range and subnet.
These issues are both advanced gotchas. If all you are doing is wanting lots of laptops, TVs, stereos to be clients of internet services... just get the Unifi UAP Lite and you're all good. Plug it into the existing modem, and disable WiFi on the modem. That's all you need.