📲 New Sonos App & Player updates for early-March are now available! 🔊

 So far no issues here so I’ll leave UPnP on.  Particularly because I do use the Windows app & SonoPhone.  Also I stream to Sonos devices using other control point apps using UPnP.  I’m guessing that would not work if UPnP was turned OFF.

Applied the second “minor” update on March 12 and it did not fix my ETHERNET issues. Level Two support blaming my Pi-Hole for blocking malware, adware, and phishing domains. One sonos domain blocked in the Pi-Hole has been whitelisted, but still no connection with ETHERNET. 

Unplug the cable, power cycle speaker, and it connects via WIFI without any issue.

Tried with UPNP OFF (it was originally set to on) and no help. L2 Support says UPNP should remain ON.

Official Sonos take on PiHole

https://en.community.sonos.com/advanced-setups-229000/sonos-pi-hole-6870549

If I see Sonos update or post-update oddities I just disable my PiHole for five minutes and try Sonos again. If Sonos works a look at the PiHole logs tells me what Sonos tweak is needed.

Yes I did try to disable pi-hole and it didn’t help.

Is there any stance on recursive DNS?

Since that is the normal operating mode of DNS it shouldn't be an issue.

Some of the DNS security options could cause problems if not working, shouldn't be just for Sonos though. The errors if any should be in the DNS logs.

Stuck in this loop every three seconds.

That is odd, unless your firewall is blocking something DHCP, but that seems unlikely.

As none of your other devices seem troubled I’d not put lease time high on my suspect list but it is worth checking. Both the Default Lease Time of 7200 seconds and the Maximum Lease Time of 86400 seconds.

Might be worth trying one more network refresh where you power down all Sonos, reboot the router and once it is up and stable power up the Sonos. Start with the problem one to make log-reading easier.

 Does the Play 1 show it is connected to the network?

No, the LED flashes white. The DHCP server does not show it connected.

Flashing white is stuck in booting phase.

Either something is very odd with your setup or the speaker is having issues. Maybe borrow a friend’s network and see if it works there before calling into support?