Just to spread the knowledge:
I moved apartments and Verizon upgraded my FIOS router from the G3100. I immediately began experiencing issues with music streaming, connecting to speakers, changing the volume etc. Basically nothing worked, or in the sparing moments it did it lagged immensely. I searched around and applied some fixes to no avail, then spoke with Sonos Support for an hour experimenting many of the same approaches with no success. I finally stumbled across a router setting that solved everything, although I suspect it was a combination of the settings changes I made that solved things. Overall here’s what I tried:
- Connecting one speaker to the router via ethernet to start a Wired Connection
- Setting the Sonos Network to Channel 11 in System > Network
- In the My Fios App, going to Advanced Settings and turning of SON (Self-Organizing Network)
- Explicitly Naming the 5ghz and 2.4ghz SSIDs
- (What finally solved it) Disabling DFS Channels
I suspect one or more of these steps may not be necessary to fix things, however the DFS disable is what finally got my system working and I don’t dare to touch it again, don’t fix what isn’t broke.
Hope this helps any others experiencing similar issues.