IssueThe Sonos Arc with Sonos One SL as surrounds disconnected after firmware update to 12.2. Unable to add Sonos One SL as surrounds to Sonos Arc after firmware update.Support Diagnostics: 60525411ObservationsSonos One SL flash white after firmware update, and Sonos Arc show question marks (?) for surrounds Sonos One SL can be added to the S2 app after factory reset. Sonos One SL fail to be added as surrounds after being setup in the S2 app as regular speakers. Sonos One SL fail to setup as surrounds after factory reset. Removing Surrounds from Sonos Arc requires Sonos SL to be factory reset to discoverSteps taken to troubleshootRebooted Sonos System Rebooted wireless access points Remove surrounds from Sonos Arc Add surrounds to Sonos Arc failed Reset Sonos One SL to factory reset Add Sonos One SL as individual speaker first, then add as surrounds failed Change room for entire setup Disabled Protected Management Frames on wireless Disabled BSS Transition on wirelessSonos ConfigurationSonos Arc 12.2 2 x Sonos One SL 12.2 Wireless 2.4Ghz and 5Ghz a/n/ac/ax (WiFi 6)Network ConfigurationNetgear CM2000 connected at 2.5GbE via Mikrotik S+RJ10 SFP+ UniFi UXG Pro 0.4.0 UnFi USW Pro 24 5.43.6 uplink via SFP+ Cisco TwinAx DAC 10G UniFi USW-8-60 5.43.6 2G LAG LACP to USW Pro 24 3 x UniFi U6-LR5.43.6 UniFi Cloud Key Gen 2 2.0.18 UniFi Network Controller 6.1.25 Advanced Settings: Disabled WI AI: Disabled Tx Power: 2.4Ghz Low (9dBm) , 5Ghz Medium (20dBm) Channels: 1/6/11 HT20, 36/149/44 VHT80 Protected Management Frames (PMF): Disabled BSS Transition: Disabled Fast Roaming: Disabled45 Wireless Clients (AppleTV 4Ks, iPad Pros, iPhone 11 Pros, MacBook Pros (2011 - 2018), HomePods, Nest (Security, Protects, Cams, Thermostat), Pelotons, MyQs, Sonos, etc.)

Wow, you’re fastThanks for replyingOk, so it’s a direct wireless connection from the cabled Arc to wireless SL’s. Good to know; I was about to install a secondary AP in the living for optimal WiFi to the SL’s. Now I’ve learned I don’t need to. (plus I don’t need to scratch my head anymore why I’m not seeing 2 new MAC addresses on my AP for the SL’s)Pity theSonos web interface on port 1400 doesn’t show any of this config...Thanks!

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cgrey001

Trending Lyricist I

Answered

Sonos Arc + Sonos One SL surrounds Disconnect (multiple APs)

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Issue

The Sonos Arc with Sonos One SL as surrounds disconnected after firmware update to 12.2. Unable to add Sonos One SL as surrounds to Sonos Arc after firmware update.

Support Diagnostics: 60525411

Observations

Sonos One SL flash white after firmware update, and Sonos Arc show question marks (?) for surrounds
Sonos One SL can be added to the S2 app after factory reset.
Sonos One SL fail to be added as surrounds after being setup in the S2 app as regular speakers.
Sonos One SL fail to setup as surrounds after factory reset.
Removing Surrounds from Sonos Arc requires Sonos SL to be factory reset to discover

Steps taken to troubleshoot

Rebooted Sonos System
Rebooted wireless access points
Remove surrounds from Sonos Arc
Add surrounds to Sonos Arc failed
Reset Sonos One SL to factory reset
Add Sonos One SL as individual speaker first, then add as surrounds failed
Change room for entire setup
Disabled Protected Management Frames on wireless
Disabled BSS Transition on wireless

Sonos Configuration

Sonos Arc 12.2
2 x Sonos One SL 12.2
Wireless 2.4Ghz and 5Ghz a/n/ac/ax (WiFi 6)

Network Configuration

Netgear CM2000 connected at 2.5GbE via Mikrotik S+RJ10 SFP+
UniFi UXG Pro 0.4.0
UnFi USW Pro 24 5.43.6 uplink via SFP+ Cisco TwinAx DAC 10G
UniFi USW-8-60 5.43.6 2G LAG LACP to USW Pro 24
3 x UniFi U6-LR5.43.6
UniFi Cloud Key Gen 2 2.0.18
UniFi Network Controller 6.1.25
Advanced Settings: Disabled
WI AI: Disabled
Tx Power: 2.4Ghz Low (9dBm) , 5Ghz Medium (20dBm)
Channels: 1/6/11 HT20, 36/149/44 VHT80
Protected Management Frames (PMF): Disabled
BSS Transition: Disabled
Fast Roaming: Disabled

45 Wireless Clients (AppleTV 4Ks, iPad Pros, iPhone 11 Pros, MacBook Pros (2011 - 2018), HomePods, Nest (Security, Protects, Cams, Thermostat), Pelotons, MyQs, Sonos, etc.)

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cgrey001Answer

Trending Lyricist I

The original configuration was the Sonos Arc and One SLs connected over WiFi. Then troubleshooting / Sonos support recommended connecting the Sonos Arc only to ethernet. The Sonos Arc creates it’s own wireless bridge in 5GHz between the One SLs as surrounds. The issue appears to be some wireless access points do not work with setting up this wireless bridge resulting in DHCP failures for the surrounds.

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Lyricist III

Wow, you’re fast
Thanks for replying
Ok, so it’s a direct wireless connection from the cabled Arc to wireless SL’s. Good to know; I was about to install a secondary AP in the living for optimal WiFi to the SL’s. Now I’ve learned I don’t need to. (plus I don’t need to scratch my head anymore why I’m not seeing 2 new MAC addresses on my AP for the SL’s)
Pity the Sonos web interface on port 1400 doesn’t show any of this config...

Thanks!

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