My Arc is connected via Cat 6 to my UniFi switch. I also have Play 3 surrounds and a subwoofer in my system (NOT hardwired). Does anyone know why UniFi would show both the sub and one of the Play 3’s today as hardwired “Fast Ethernet” connected devices, and on the same port! Both of the devices IP address match what the Sonos app shows for each device. This is strange.
Question
Arc connected via Ethernet to managed switch.
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+9Would it happen to be the same switch port the Arc is plugged into?
The Sub and Play 3 form a wifi network with the Arc when you added them for sending the audio from the Arc to the other speakers. The Sonos devices have probably made a request either to the Lan or Sonos cloud, which goes across the wifi network to the Arc and out the Arc network port. The other Play 3 will probably show up at some point.
The unifi has no concept of what the network looks like, it just identified traffic with a new IP address on the port.
Yes, they are showing on the same port that the Arc is connected to, but the Arc doesn’t show as connected.
Out of curiosity, play some online music through ARC. Now does the switch show ARC is connected?
+9Yes, they are showing on the same port that the Arc is connected to, but the Arc doesn’t show as connected.
I don’t know the Unifi interface, but if you go to a port overview I would expect to see that the switch port the Arc cable is plugged into shows as connected with a link speed.
From your description it sounds like you are looking at more of a device map, ie what IP and likely MAC addresses have sent traffic via a port, which isn’t the same as what physical devices are plugged into a port.
A server for example, could have many containers or virtual machines with unique lan IP addresses. The view you are looking at would identify multiple servers on the port even though there is only one physical server.
As @buzz says, if you stream some online music on the arc, not via hdmi, it will should up as a device connected.
When you looked at the ports in the UniFi UI it only showed one device connected and it was the sub. However, looking at the UniFi Device page you had both the sub and Play 3 showing “Switch 2 Port 6”, while the Arc’s connection was just “-”. I’m not sure what the issue was, but I removed all the Sonos devices from the Sonos app and re-added them and now the Arc shows as the only connected device on that port, the 3 other devices now show “-” and everything is working. Airplay also wasn’t working earlier, now everything is working as it should. I was also having some eARC issues with my Sony TV, those have now been resolved as well. PITA!
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