On January 6, 2017 at 16:57, cma said...
You have a managed Ubiquiti switch but are using the provided AT&T modem as the router? The first thing I would do is put that thing in bridge mode and get a real router..
That said, I have never had a SONOS issue on any of my Ubiquiti networks including my one at home.
The AT&T modem/routers in our market cannot be bridged...We've tried every way around that reality possible with no stable success. As explained, the client was finally able to get TWC service, so now we're running an EdgeRouter Lite with an Arris Modem [no internal router].