One Speaker Missing on Some Controller Not Others

It must be incredibly frustrating for you.  It may be worth looking at the network matrix.  If you can locate the IP address of one of your speakers (not the Boost), then substitute that into the following browser address

hllp://IPaddress:1400/support/review.  

Then click Network Matrix.  If you would like to post it i’ll take a look and see if there are any clues. You may wish to obscure the MAC addresses.

I’ll understand if you have had enough and don’t wish to do this

Complete uninstall and reinstall, seems to be stable - for two days at least. Thanks, John.

No, my music library is still facacte...

...aaaaaaaand, we’re back.

Same speaker - appears in Android and iOs controllers, NOT on Windows controllers. Obviously is playing music - and if I change what to play on Windows, it “follows” (probably b/c it was grouped on the iOs). But it does not appear on Windows.

Uninstalled Sonos on PC. Rebooted. Reinstalled fresh from a new download.

Unplugged speaker and plugged it back in. Nothing.

Given all its glitches and need for constant retuing, I would have felt Sonos was a waste of money at ten percent of what I paid for this.

@Alonzo Mosley,

My understanding is that with Sonos Networking on a LAN subnet, a packet can be sent to:

• A single host - Unicast - (TCP and UDP)
• All hosts - Broadcast - (UDP only)
• A group of hosts - Multicast - (UDP only)

Broadcast messages are not sent through routers, but multicast messages are. So I reckon in your case the router SSDP Multicast messages used to discover your Sonos speakers are ‘perhaps’ sometimes not always working as they should be. Some switches may also cause these type of problems, as can some wireless extenders too, particularly if operating on different WiFi channels.

So I would first go check to see if there is a router firmware update, or maybe even consider switching the router for a different brand, or model, otherwise I suspect you may just continue to encounter the same intermittent issues, from time to time (perhaps?) despite whatever you may try to do with your wired/wireless Sonos devices and mobile controllers.

Maybe speak to your Routers support desk to see if they are aware of any such SSDP Multicast issues and just see if there is anything they can maybe do to assist, or if they may already have a solution in their development pipeline.

I understood almost none of that! But…

1. This is the second router I’ve had this Sonos system on. The previous one had issues - just not these issues - with Sonos. (I switched from Cable to Fiber internet last summer).
   1. The firmware is indeed up to date
   2. Obviously I’m a little suspect about replacing another $200 piece of equipment to get the existing $1600 worth of stuff to work like it used to.
2. Just for background - I’m in a ~1100 square foot, single-level apartment. I have a Boost and a Play hard-wired into the router.  (I suspect you know that from previous posts, but people don’t always read backwards…!) The walls are drywall. There really shouldn’t be interference issues?
3. I’m a little confused about how your explanation explains how some controllers “see” the office speaker but others don’t. If I understand your answer (which I already said I don’t...), it would seem that the office speaker would disappear from the entire system sporadically, not just from the one controller…?

Thanks for taking the time to answer. When I bought this router 18 months ago, it was described as “strong enough to cook your balls from 500 feet”, so, you know, I figured it would be strong enough to toss Adele across the living room...

It’s my thoughts that your speakers are still all connected to the LAN, via SonosNet, (even when you cannot see them in the App) but the Mobile/App is not always ‘discovering’ their presence as the multicast messages are ‘sometime’ failing - hence my thoughts were, it might be your router is a bit flakey in this area (possibly) and the packets are not working as they should be - As it’s the latest firmware from the router manufacturers website, then (if not done already) perhaps see if reserving all your Sonos IP addresses in your routers DHCP reservation table might assist with their discovery. 

@Alonzo Mosley,

Next time you perhaps encounter a ‘missing’ speaker - just see if closing the Sonos controller App fully (slide off mobile screen) and then toggling off/on the mobile WiFi network connection for a few seconds, causes the device to reappear when you reopen the Sonos App after reconnection to the router. It might at least show, its perhaps a ‘discovery’ issue and that things are (intermittently) failing on your network for some reason.

Well we know that since they all appear in the Android and the iOs apps. Interesting thought on reserving an IP - I believe they always grab the same ones, but…

Note: The offending controller is a Windows PC. I have uninstalled the software, rebooted, downloaded fresh software, and reinstalled - and it didn’t find it.

Might it be a firewall issue perhaps? What happens if you toggle the firewall off and leave it off after a reboot?  - is the PC wired to the LAN, or wireless?

PC is (and always has been) wireless.

Tried with Firewalls all off. No difference. (Firewall off → Reboot → Un/replug speaker → Reboot).