I had posted this thread earlier: https://en.community.sonos.com/troubleshooting-228999/variation-on-the-at-t-u-verse-pace-5268ac-router-problem-6798455
Unfortunately, the problem has been back, and I've discovered a couple of other things:
- The speaker never seems to disappear when hard-wired to the router (or at least, I haven't yet seen it disappear). All well and good except where the router sits is no where near where I'd want the speaker, so that's a moot point. Besides, it's supposed to be a wireless speaker, so I want to be able to use it as intended. So it seems I'm seeing it drop off only when using wireless.
- When the Sonos is accessible with the app, it's also ping-able. I wasn't sure if perhaps it just didn't support ICMP at all (I have an older wireless-ready Blu-ray player that doesn't seem to support being pinged even when connected to the network), but that's because I only ever tried when it had disappeared. After rebooting my router and it becoming findable on wireless again (or hard-wiring it directly to the router), I see it does respond to pings.
- When the speaker disappears, it just seems to be for *inbound* packets. I'm primarily using it connected to a NAS where I've copied my music library, and I've learned the speaker seems to remember what it was playing so that if I pause it then press the play button on the top, it picks up where it left off. So I started it playing music from the NAS, paused it and left it alone. The next day I tried to access it with the app and it had disappeared again (nor would it respond to pings), but when I pressed the play button, it seemed to start streaming music from the NAS again. I let it play for a few minutes though admittedly if the speaker has a sizable local cache, it may not be pulling that over the network; but if it is, then the speaker has not been blocked by the router on the network. Besides, when it disappears, I can use an app called Fing which scans my local network and it sees the speaker.
So this would seem to point to some problem with using the speaker on wireless. Sonos tech support appears to have thrown up their hands on this (they advised me to post the problem to the community). Given it (so far) has not seemed to have a problem when connected via Ethernet to the router, I was thinking my only option would be to find a wireless range extender which can support a device connected to an Ethernet port, and connect the Sonos to that port (so the speaker never tries to use its wireless). I think they sell these so you can connect non-wireless devices to your local network away from your router, so I'm wondering if anyone has tried this? If so, what is the make/model of the extender you used?