Sonos control across a VLAN has stopped working

  • 14 December 2019
  • 4 replies

Userlevel 1

I have a Unifi setup, and have all IoT devices (including Sonos) on a separate VLAN to my main computers and phones.  This has always worked well, using an IGMP proxy and mDNS reflector, setup on the Unifi Security Gateway.

All of a sudden, this has stopped working, and not just for me.  Consensus on reddit seems to be this is due to the latest Sonos firmware update: 

Manually connecting the iOS device to the VLAN with the Sonos devices, and opening up the Sonos app connects.  You can then go back to the normal VLAN on the iOS device and the app continues to work no problem.  However, kill the app, and try to reconnect to Sonos when the iOS device is connected to the main network, and it can’t find any Sonos devices.  It’s that initial connection/discovery bit that is broken, even when the app has previously been connected to the devices.

Is anyone else seeing this, and are Sonos aware?

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4 replies

Userlevel 1

Same here! Nothing changed on Unifi setup and software!



IoT: eth1.20

private: eth1.10


Checking with “show ip multicast mfc” show this:

Tested the data flow with “show ip multicast interfaces”:


Userlevel 1

Here is a second post:

Badge +2

OSX controllers are effectively now broken across subnets with 10.6


Android controllers are still working


Here are some more threads on the subject.  I just spent an hour on the phone with Sonos and their support is unaware of this issue. 


I think all of us should place a call to them directly, point them back to the forums, and ask them to fix this update


Userlevel 2

Looks like the issue is the Sonos kit now responding on random high UDP port numbers.  I’ve updated my original post at VLAN Issue on Unifi Network