I just had 4 emails come in all with sonos issues, dont know if its a coincidence or what but two of my clients cant see one or two rooms and the other two cannot use their system at all. Resets dont work, hard resets dont work. For four clients to email me today on a Sunday seems more then a coincidence.

Did they push firmware out or something else that i dont know about. My sonos system is running fine

Could it have something to do with the latest 6.1 release?

I can confirm an issue with my system at home. I updated to 6.1 this morning and when I went to select Sonos it acted like my phone was never apart of the system. So I resync'd my phone and it asked me to register. I said no at first but and it didn't fix it. So I registered and at the end of the process it said I could not and it would not bring up our 1 zone player.

PC works fine...

Had two Sonos systems go wonky this weekend.

Mine seems to work fine.

Opened up the PC software and started Pandora. Now my phone has been working.

I just sent an email blast to all my clients to not download the update. I have 3 other customers that have emailed me with issues, 5 of them downloaded the update 2 others are not sure lol (im going to assume someone in the house did)

UGH!

Not sure what you have to gain by sending an email to not dl the update. Just asking for 100% service calls and increase doubt in the product reliability. I understand getting in front of the issue but better to send the blast notifying of potenial issue and a fix to come soon but to go ahead and update if prompted. It sounds like at least 1/2 did not have issues so you are including them when not needed. Just my .02.

My guess is your devices updated but the apps have not yet.

I would have close to 50-100 service calls if I sent that email. Scary.

Went to fix the first system, Nothing I did worked until I completely reset everything to factory settings, cleared out the routers mac address reservations and starting off from scratch.

Not sure what happened to cause me to have to "redo" the system but ive got a few more houses to stop at to confirm this is the fix.

I had a client tell me last week his system has become disabled, I logged into his computer and it only see's the root bridge. The other 8 zones are gone. Some of his Sonos controllers show some of the other zones by themselves. He mentioned he recalls seeing something about an update on his controllers but beyond that he wasn't sure. I typically turn Auto Updates off but I believe it turns back on anytime a new controller is added.

I have another client that was using his Sonos last night and now the system has no zones. I have a tech onsite now looking into this, he hardwired his laptop into the root bridge and the only thing it see's is the bridge. The bridge is running Version: 3.8.3 (build 19459140)

I will update if I have any more relevant info.

This sound like a carrier has pushed a firmware update to the router. Is the router hardware the same in all these locations?

The very first thing to do is to 'Submit Diagnostics' to Sonos, AND/OR view local diagnostics by doing this:

[Link: IPADDRESSOFSONOSPLAYER]

Look at the Network Matrix, and if you see a whole bunch of UNDEFINED units that still have inbound and outbound figures, then it is a IP addressing/routing issue.
A complete network power down and power up in this order should fix things:
Modem
Router
Network switches
Any wired Sonos components
Any wireless Sonos components
Any permanently on devices (printers, NAS drives etc)
Computers
Anything else

We really appreciate getting a snapshot of the system before anyone plays around so we can attempt to see the root cause of the issue.

Well I ran a sniffer and found one of the Canon printers went rogue. It sent 20,000 packets in under 30 seconds. I know Canon printers can be known issues but neither device is new to the network so i'm not sure what changed to cause this.