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Speakers kept dropping from the S2 App after change to ATT fiber router and Eero mesh (SOLUTION).

  • November 7, 2025
  • 3 replies
  • 51 views

Apologies for the longish title but there are a lot of threads discussing speakers dropping, but none seemed exactly like mine. I love my Sonos system but ran into connection issues when I changed my WiFi from Xfinity cable to an ATT Fiber Router and added two Eero 6+ mesh devices to get signal around my house. While I’m not an IT expert, so excuse any naming errors, I am not afraid to try things out.

My system: S2 app, Play 1 gen 1 & Sub Gen 3 (Grouped), Amp (Outdoor Speakers), Arc Ultra (TV), and Boost (now offline). Everything is wireless, no direct connections after dropping the Boost. 

My Issue: After connecting everything, which took a while, the Arc Ultra kept getting dropped. If it connected, then either the Amp or the Grouped Play 1s or Sub would get dropped. I could see all of the devices in ATT Gateway Router (Nokia) and on my Eero app. After researching the issue, I think that there were conflicts with the wifi bands and wifi sources. The speakers were connecting to the ATT Gateway or the Boost or the Eero mesh, and they wouldn’t “communicate” with each other. The Arc Ultra, connected to the TV, may also have been using 5ghz while other speakers were using the 2ghz frequency. 

My Solution: I found some guidance on the Eero website and tips in the Sonos Community for connecting Sonos to Eero and Eero to the router. After a lot of rebooting, reconnecting, and researching, I ended up changing my ATT Fiber Router firewall to “IP Passthrough” mode. I also disconnected my Boost after figuring out that it was also a type of “mesh” system (aka “Sonosnet”). This ended up simplifying my system so that it was just on the Eero Mesh.

My Results: My system has been a lot more stable since the changes. I still experience Speaker drop in the S2 App, but not as often (once a week or less). When this happens I reboot the router, restart the S2 app, and wait at few minutes (waiting patiently is key). Then everything shows up in the S2 app again and works fine (so far).

Conclusion: I found that you have to do a lot of research, trouble shooting, and not be afraid to mess with the router set up, in order to figure out solutions that work. No one tells you that it’s not the one stop set up that it should be. The S2 app is still problematic and not easy to use but it works well enough to enjoy music or movies on my system without having to replace some of my older components (which I have had to do in the past, it’s costly and aggravating). Finally, the connection “hiccups” are not ideal but rebooting the router is easy enough and I still really love my Sonos set up.

Side Notes: The Arc Ultra didn’t seem like a big improvement from my Soundbar. Changing from Xfinity cable (NetGear router) to ATT Fiber also wasn’t a big improvement either because I had to get a mesh system. I’m also concerned that I will have to replace my older Sonos components in a few years, which is costly.

3 replies

Corry P
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  • Sonos Staff
  • November 10, 2025

Hi ​@Clarkescan 

Welcome back to the Sonos Community!

I am glad to hear that you have found the solution that you did! Thanks for sharing!

What you have discovered is that it is not healthy to have two (or more) DHCP servers running on your network. DHCP servers are what assign unique IP addresses to each device that connects to the network and typically operates as a subsystem of a router. By adding a second router to your network, you basically added a second device that will respond to all new connections asking for IP addresses. With two such devices on a network, a client device will only listen to the first reply, resulting in two tables of assigned IP addresses, the devices on one knowing nothing about the devices on the second. As most WiFi devices only care about connecting to the internet, it is systems such as Sonos that need to connect to local devices in addition to the internet that highlight such issues.

By enabling IP Passthrough mode, you’ve basically disabled the DHCP server on the old router so that the main Eero device can perform that task instead.

This is a vital part of maintaining a healthy network that few are willing to educate anyone on. My Troubleshooting Sonos on WiFi article covers it all :)

A Boost will create a mesh system for Sonos devices because when we first came on to the market, routers were not up to the task, frankly. Now, routers are much better, and you already have a mesh WiFi, so a Boost is no longer needed, and you will get better results by using the WiFi mesh that is already there - in most circumstances, anyway.

Side Notes: The Arc Ultra didn’t seem like a big improvement from my Soundbar.

You don’t state what your previous soundbar was, but I am still surprised to hear this - have you tested Atmos playback?

Changing from Xfinity cable (NetGear router) to ATT Fiber also wasn’t a big improvement either because I had to get a mesh system.

I can’t really comment on this. The reach of your router will depend on the size and construction of your home, as well as the electromagnetic environment from your other devices and neighbours’.

I’m also concerned that I will have to replace my older Sonos components in a few years, which is costly.

We have taken steps to avoid this situation for as long as possible - older legacy devices that run S2 are now on a separate software branch that will not receive new features but will keep older units operating for the foreseeable future. Please note that every player product line we have ever made still operates in the same fashion - or better - than the day it was released.

I hope this helps.


  • Author
  • Contributor I
  • November 13, 2025

@Corry P - Thank you for the explanation and the link to your guidance. I’m pretty sure I read it, which is why I ended up changing my router to IP Passthrough. It’s been a couple of weeks since I made the change and my system has been pretty stable. I have had to reboot my system a couple of times because the S2 App or one of the speakers/groups looses connection. In this case I found that it’s important to be patient when rebooting to allow everything to reconnect. Unfortunately the big box stores don’t always have such good advice/experience with these systems so hopefully others with similar conflicts will read this and make the changes.

Regarding the Sonos Arc, we do like it but it wasn’t as big an improvement from my old Sonos Playbar as we had hoped. We have watched movies and tested the Dolby Atmos on some videos and it’s very good/pretty awesome. However, we mostly watch sports and didn’t notice a big change in the sound quality (e.g. live sports on the Playbar sounds about as good on our older HD TV (optical out) as the Arc does on our new LG OLED TV (HDMI out - arc/e-arc). It’s probably a combination of old ears (ours) and that most broadcasts aren’t in Dolby.

Understood on the older units, my original Play 1’s are still working fine on S2. To you’re point, I’ve been able to upgrade most of my system by adding speakers vs replacing them. I did have to replace my older Amp and Sub, took advantage of the discount. Anyway, I’m sure you’ve heard the comment and I appreciate response.

Thanks!


Corry P
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  • Sonos Staff
  • November 13, 2025

Hi ​@Clarkescan 

I’m glad to hear things have definitely improved long-term! Something that may improve matters more (from what I can gather from what you mentioned above) is to go into the router’s settings and reserve IP addresses for your Sonos devices. Sometimes, a router can hand out the same IP address to 2 devices, and if that happens to an address that should be a Sonos player, the app can get understandably confused about it. Reserving IPs for Sonos devices prevents this from happening (though in an ideal world, the router would never do this in the first place).

Regarding the Arc Ultra vs Playbar, I think it is safe to say that you will notice the difference far more with movies than with sports - it will largely depend on the audio format that the content is using, and I am not sure sports ever delivers more than Dolby 5.1. Such would not sound significantly better versus the Playbar, but I would expect you to get more bass from the Arc Ultra (assuming no Sub is present).

Sometimes, it’s just a single scene in a movie that jumps out - the first few minutes of The Old Guard 2 come to mind, as it’s set in a boat at sea with wild weather.

I have an Arc Ultra of my own, and I think you’ll get more and more impressed with yours as you use it more ;)