Entire system keeps disconnecting

That sounds like a network issue. Please describe your network such as hardware (yours or that provided by ISP) and any changes or additions make. Changes made does not include adding new Sonos products.

Using Netgear MR70 mesh router with 2 satellites.  Have not made recent changes to router settings, other than removing my guest network as suggested by a Sonos support system.  I did remove an Ethernet-connected Playbar when I added the Arc Ultra, the Ultra is not ethernet-connected.

OK.. is your main Netgear router connected to hardware provided by your ISP that houses both a modem and router (combo box)? Also are the WiFi bands separated by different SSID’s?

Main router is connected to Spectrum’s PC 15 modem.  I do have 2 separate SSID’s for 2.4 and 5ghz, but I am connected to the main SSID (I may be mistaken but I think the main SSID includes both bands).

OK…

I suggest you unplug all Sonos. Do not factory reset your Sonos.

There is no such thing as a main SSID. Therefore, open your routers admin and make sure ALL Wi-Fi bands have the same SSID. 

While in your routers admin disable band steering which allows the router to dictate what WiFi product connects to a particular band. Also, make sure Airtime Fairness is disabled.

Reboot the router and let it comeback

Delete the Sonos app from your device and reboot it

Plugin your Sonos and let them comeback 

Reinstall the Sonos app and select “Join an Existing System, follow prompts and sign in with  your credentials 

Thank you.  I’ll be trying this in a few hours and report back.  

👍

Just a clarification about Main SSID. You may have a Guest Network with a different SSID which may have prompted your use of the term Main SSID. Since Sonos doesn’t operate on a guest network the term Main SSID doesn’t apply.

 Do you see the Spectrum WiFi?  If so put the PC 15 into “Bridge Mode”.

By all accounts and my research the Spectrum PC 15 is just a modem. Therefore there is no WiFi signal being broadcast.

Correct, it is just a modem.  Router is the Netgear MR70.  I’ve tried to complete the recommendations, bottom line the system is now working.  However I would like to get some additional info about the following:

1. With regards to one SSID, under Wireless Settings, I have an SSID 12345_Main which includes 2.4 and 5GHz channels.  This was my original SSID, and I had a separate SSID called 12345_2.4; I have now removed the 2.4 SSID.  When I went to “Customize WiFi Network in the Netgear desktop app, I don’t even see 12345_Main, but I went ahead and created a new 2.4 Ghz network called 12345, and a third network for 5Ghz called 12345_5G.  When I finally  reconnected , I connected to the new 2.4 network (12345) and finally everything connected.  But I now have 3 SSID’s and can’t figure out how to delete the original 12345_Main.
2. I could not find a band steering option, but google says you can try to disable “Enable AX”, which I did.
3. Also could not find Airtime Fairness, the only info I could find says that it may have been eliminated in a firmware update, but no idea if that means it’s a default on condition or default off.  
4. Otherwise I followed all the reboot, unplug, delete/re-install app and at this moment Sonos life looks good

Thank you for your assistance.  Any further comments on the above info are greatly welcomed!

 I wish I could split the 2.4 and 5 giving them the same SDID.  Xfinity does not allow that with their Gateway ( Modem/Router ).  Years ago they provided a gateway that broadcast a 2.4 & 5.  The 2.4 & 5 were part of the SSID name.  All I did was make sure the first part of the SSID name was the same.  So it appeared homeWiFi 2.4 & HomeWiFi 5 ( Fake SSID of course ).  With Xfinity now I’m stuck with Band Steering.

 Confused as to why your router is broadcasting 3 SSIDs.  Does it do WiFi 6??

Glad your Sonos is working!

According to this link the Netgear MR70 is a Dual Band Wi-Fi 6 Mesh (2.4Ghz and 5Ghz). The MR70 is the Router and the Satellites are designated as MS70.  

If the MR70 were a Tri-Band router you might see the following band combinations:

2.4Ghz, 5Ghz and 5Ghz 

or 

2.4Ghz, 5Ghz and 6Ghz

That said your 2.4Ghz and 5Ghz should have the same SSID. If you are seeing a 3rd SSID then you must have a Guest Network setup as well. There’s nothing wrong with having a Guest Network it’s just that Sonos will not connect to it.

The reason for having the same SSID for your primary 2.4Ghz and 5Ghz bands is to allow Sonos and other Wi-Fi capable devices select the best band for their needs.

MoPac - The MR70 does do WiFi6

AjTrek1 - The 3rd SSID is not a guest network.  The “3rd SSID” is actually the original one I had, before I added the new separate band SSID’s yesterday.  I see no way to delete the 3rd SSID.

 I think you have to factory reset the MR 70.  I’d look it up.

​@Joe_Mamma 

If you must factory reset your MR 70 to remove the 3rd SSID you’ll need to follow my previous instructions (i.e. unplug all Sonos etc) to get everything correct. That also means you’ll have to setup the same SSID’s that Sonos is currently using. Do not change the SSID’s for Sonos as that will cause major problems. 

​@Joe_Mamma 

I just thought of this…

That 3rd SSID could have been one set for IoT devices and/or parental controls. Just a guess🤔