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Question

ERA 100s used to connect to eero network but now do not

  • December 28, 2025
  • 5 replies
  • 9 views
K

I have 2 ERA 100 speakers, one in the master bedroom and one in the master bath. The WiFi is an original eero Pro configuration in bridge mode, with DNS/DHCP provided by a Linux server. The ERA 100s have been working great in this configuration for 2 years. Recently, however, the one in the master bath is no longer on WiFi, nor was it visible in the Sonos app.

After resetting the device a couple of times I powered down ALL Sonos speakers (6 Shadow SLs, an Arc and a Playbar among them) and powered off ALL the eero Pro devices. I then brought the eero network back up and then re-powered all the Sonos devices, doing the ERA 100s last.

ALL the speakers came back online problem-free EXCEPT the ERA 100s. I just went through the reset procedure on the master bedroom ERA 100 and the behavior is the same: The speaker comes online, I can see it get an IP address from my DHCP server. However, within a minute it drops off the network, never to be seen again.

So, both of my ERA 100s are offline and looking very sad.

Help!

5 replies

Airgetlam
  • Airgetlam
  • December 28, 2025

Interesting. I’d have avoided the factory reset, since that erases all error codes stored on the device, but I’d still recommend that you submit a system diagnostic within 10 minutes of experiencing this problem, and call Sonos Support to discuss it. Don’t post the resulting diagnostic number here, their lawyers get sensitive about GDPR.

There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.

When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.

Bruce
K
  • kirkson
  • Author
  • Contributor I
  • December 28, 2025

Thanks! I’ll follow up on this with Sonos Support tomorrow. 

    Airgetlam
    • Airgetlam
    • December 28, 2025

    My suspicion is, without any data, that the two Era 100s are connecting to an eero Pro device that’s generating a different subnet, so that they’re not connecting properly to your original system…but that should hopefully be proven (or not) in the diagnostic data. I’d be interested in what response you get.

    Bruce
    K
    • kirkson
    • Author
    • Contributor I
    • December 29, 2025

    You were very close! I had set up a Raspberry Pi with the SSID that I was using on the eeros until about 2 months ago.TBH I can’t remember why I did this!

    When I changed our network SSID 2 months ago I failed to remove the old SSID in the Sonos app. The Pi was close enough to the ERA 100s that they managed to find and connect to it.

    Solution: Remove the old SSID from the Sonos app, reset the ERA 100s, and wipe the Pi’s disk so that nasty hotspot never sees the light of day again.

    Thanks for the super-quick response with the exact steps to take, and thanks to Sonos Support for their assistance with this. And shame on me! 😵

      Airgetlam
      • Airgetlam
      • December 29, 2025

      Heh…close doesn’t normally count, but I’m both happy you found it, and that Sonos support was able to help. 

      Complex networks are…well, complex. I was worried as soon as you mentioned both Unix and eero, neither of which I’m terribly familiar with. But I do know a bit about how Sonos connects, and was hoping Sonos Support would see details in their systems that I didn’t have access to ;)

      Enjoy listening to your complete system!

      Bruce
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