network bandwidth insufficient to maintain playback buffer

Since your BOOST’s are on different floors, they will not interfere with each other. The basement router and BOOST should be separated. A single BOOST will support 31 players if wireless conditions are reasonable. In your case placing a BOOST on each floor is productive. The SONOS system will work out the details of where to connect. The players can connect to each other or a BOOST.

As a quick system check, go to Settings → System → About My System and make sure that each player is indicating “WM: 0”. “WM: 0” indicates that the player is using SonosNet, not WiFi.

Thanks buzz.

I checked the About My System and all but two speakers were connected on WM: 0. When I added one of those speakers which was on first floor to the music group it got WM: 0, but another speaker from ground floor About My System information disappeared. However, we got so much disconnecting and connecting during this test. Random speakers, which were connected to seperate boosts get connected and disconnected. For a few seconds a random speaker plays nothing and then might or might not start playing.

I should add that we have restarted all the speakers then the two boosts and then reconnected the speakers to the boosts and it did not help. Still getting a lot of hiccups by speakers and disconnection.

I just been informed that in the past, before we used boosts and Sonos system, the Sonos speakers were connected with wifi to the iPad Sonos app, does it seem like the sonos app has problem and speakers hiccups has nothing to do with the setup of system and boosts? 

Any suggestions would be appreciated as it is annoying that the speakers get so many disconnection and connection inside the restaurant.

A new observation, when only two speakers were inside a group music was playing properly, but then I added new speakers to the group and it stopped playing properly. I decided to add all speakers to groups of 2 and then most speakers vanished from the list completely. 

If anyone tell me where you think the root problem is coming from I will try to check that.

If a unit is flipping between WM: 0 and WM:1 you are operating in “mixed mode”, probably due to difficult wireless conditions. Try temporarily wiring the difficult unit, then remove the WiFi credentials from the system. This will force the system to avoid mixed mode. Mixed mode can be erratic with some routers because the router might switch channels.

Now, go to

http://[IP address of a player]:1400/support/review

At the bottom open “Network Matrix”. Red cells indicate difficult wireless conditions. Note that this is a static view. Refresh the page after making a change. Red cells don’t automatically imply that the player will not work, but your attention should be spent improving conditions for these units. You may discover that conditions will vary by time of day.

 Thank you so much buzz, I am planning to perform the link check of the speakers as you instructed tomorrow and will get back hopefully soon after, but I should also mention that I have never seen WM:1, therefore I assume there is no flipping issue. 

Hello buzz,

I have tried to go into:

http://[IP address of a player]:1400/support/review

And when two speakers were playing then some were orange and some were green and grey but no red. I checked again in a few minutes and only one became red but again refreshed the page and it was okay. 

However, when added two more speakers to the playing group it all went on constant hiccups and disconnection and when I tried to check their connection on that link above it gave a page cannot be reached error.

This indicates some sort of wild, intermittent blasts of interference. I am next door to a medical facility and I suspect that they are running something obnoxious because I’ll have mostly red cells in the left column and a few minutes later they will be mostly green. Fortunately, the SONOS system can cope with my situation.

Start keeping a log. You may be able to identify a pattern and track down the interfering device. For example, some microwave ovens cause issues -- only when they are running.

And, of course, we cannot rule out hardware issues.

When in diagnostic mode, never assume that the issue must be [ … ] or cannot be [ … ], else one is likely to be blindsided. However, one should play the percentages and not chase the 0.01% probability before the 90%.

Submit a diagnostic within about 10 minutes of an event and note the confirmation number. Follow up with SONOS Support. They have access to much more detail from the diagnostics.