Ive got 3xBE65 hardwired together via Ethernet. 

On 2 of the devices I have a Sonos Play 3 connected. The way the Sonos operates, is that if a speaker is hardwired to ethernet, it branches off and creates it own SONOSNET 'wifi' with other speaks. If you don't have it connected via ethernet, it will then use the WIFI network that is available. 

However, on one of the Deco devices (the one in the office, which is linked to the lounce, which is liked to the bedroom (and the bedroom one is the main one and they are daisy chained), it says 'the ethernet backhaul speed is low. Please check your ethernet connection'. 

I'm running cat5e and it's about 10 metres between decos. The link still shows that it's connected via ethernet, so I'm assuming that 'slow' means still working.. I'm not sure if it's dropped back to 1gbps or lower. 

However, removing the ethernet cable from that joins it to the other deco, it still says the same message. This happens after a reboot and waiting for an extended period of time. I'm thinking that perhaps the backhaul is now looping via the sonos connection, via the sonosnet network, and back into the other sonos connected to the other DECO. This kind of makes sense, as this SONOS network is about 100mbs. 

Does anyone know if this scenario is workable, or can I have more than one sonos wired to the deco's? Does it support STP or block out loops? 

I've just updated to the BETA 1.1.17. The Sonos speakers play music and there isn't any obvious issues (other than the complaints that everyone seems to have had about the sonos app). Curious to see any feedback or suggestions.

My next steps is to purchase another ethernet cable and run it to see if the error goes away. 

Cheers