Music skipping to next track

Several skips have happened tonight. The confirmation number is 1339777401.

Thanks!

Hi @dan8558 

Thanks for sending that.

First, it looks like your ethernet-wired Sonos devices are still relying on a wireless connection (wired to a mesh node, maybe?). Things will likely go better if you can instead get a device wired directly to the router, or to a switch that is in turn wired to the router.

However, the Sonos devices are unable to communicate to each other on your network effectively as they are being swamped by multicast packets that aren’t meant for them (the worst I remember seeing - there’s a lot). The main source of these has a MAC address of CA:52:AF:F0:21:40, but there are quite a few other sources. Finding that MAC address in your router’s connected client list should help you identify it.

If your router has an IGMP Snooping/Filtering option, I highly recommend you turn it on. That would filter out the multicast packets. The cheapest alternative would be to fit a IGMP-capable network switch to do the task instead. It’s possible that only a reboot of the router is required, however, so I recommend trying that first. Be sure to leave it unpowered for at least 30 seconds.

I also recommend you put all of your WiFi access points on channel 1 (two aren’t) and put SonosNet on channel 6 (Settings » System » Network » Change SonosNet Channel » 6) - only change the SonosNet when no rooms are missing from your app, and after fixing the IGMP. If rooms go missing after the change, change back to channel 1 to pick them back up and try again.

I hope this helps.

Hi Corry,

My wired Sonos devices are connected directly to either an access point or the router with the access points wired directly to the router. 

I’ve also switched all the access points and router to channel 1 from Auto. It was always my impression that they were always using channel 1, but apparently not.

I’ve identified the device with the MAC address you posted as being a phone. I’m going to buy a managed switch with the IGMP option today and I’ll set that up. We have a lot of devices in the house, but hopefully I can figure out how to reduce the multicast traffic without having to rely on the switch to deal with it all.

Thanks! I’ll let you know how it goes.

I think I’m going to buy a managed switch to help with the multicast traffic. I’m wondering about how to add it. Should I cable the new switch to my main router LAN port and then cable both access points to the switch rather than to the router LAN ports as they’re connected now?

Hi Corry,

I’ve installed a managed switch and enabled the multicast traffic control features, but I’m still having skips. I’m wondering if the problem continues to be multicast traffic, so I submitted a new diagnostic. The number is 95006550.

Thanks for any help you can provide.

Hi @dan8558 

Yes - connect any and all ethernet connections via the IGMP switch, and connect the switch to the main router.

Unfortunately, I’m still seeing a massive amount of multicast flooding. Other errors are reported but multicast flooding is the likely cause of them all (limited bandwidth, bad Cloud Health and transport errors). This may be of additional help:

Edit: The “Broadcast” type is essentially “multicast to all clients”, rather than specific ones, so is also causing problems.