I would check the path to the share and the login credentials and ensure that the netbios computer name is no longer than 15 alphanumeric characters and contains no special characters too.

You could even replace the computer name with the IP address in the Sonos library path, but if you do that, then I would suggest fixing the IP address in your new routers DHCP Reservation Table. Oh and don’t forget to re-index your library if you haven’t done that already, or if you make any changes.

After replacing a Gateway, reboot EVERYTHING on the network. It’s best if you power everything down, then restart in the following order:

Gateway
Network Switches, if any
Comcast “Pods” (While I don’t recommend using these, if you are stuck with them, at least try to use them)
Wired SONOS units
Wireless SONOS units
NAS, if any
Everything else

Allow each step to finish before moving to the next step.

At this point I expect that everything will be working and you should log-in to the router and reserve IP addresses for all regular network clients. You’ll need to go to Connected Devices and EDIT each device to select Reserved IP.

Ken and Buzz--thank you for responding.

I should have mentioned that I am not very tech-savvy...I do not understand your instructions. I will have to get help from a friend to implement them.

Thanks!

Until your friend shows up, shut down everything on your network, then restart in the order above.

I haven’t been able to reach my friend.

I have done some research and determined that I do not have any Network switches, Comcast PODS, or NAS.

EVERYTHING on my entire system is working fine except Sonos. And the ONLY feature not working on Sonos is my Music Library...Sonos cannot find the music files stored on my computer. Last night I listened to music on SiriusXM and it played just fine in all the rooms and also on my Roam.

I am wondering if I should remove all the folders in Settings>>Music Library Settings>> My Music Folders on Sonos, and then re-install them. FOR SURE I do not want to do anything that could cause more problems.

Your advice?

Do you use your computer as a SONOS controller? Is it a PC or Mac?

Do not Factory Reset anything without further consult.

I launch Sonos from my computer (laptop PC), select the rooms where I want to listen (I have 7 Connects for speakers in 7 rooms, plus a Roam for taking outside), go to my Music Library and add some Imported Playlists to the queue, and start playing the music. Then I launch the Sonos app on my iphone and control volume from there while I move around in my house.

What makes me think I could Remove the folders and then Add them again is that I was the one that added them in the first place, when I set up Sonos initially. I can’t imagine it would be considered a Factory Reset. I am thinking that the new router might have a slightly different setting from the old router, that has altered the Paths to the music files.

BTW...my computer’s name is, and always has been, DELL-LAPTOP2019. Any problem with that?

You are correct, deleting the SONOS library setup is not a Factory Reset. There’s no harm in removing and adding folders to the library setup.

In your Gateway there is a function similar to the reception desk in a building. As clients enter the ‘building’ (network) they are given a number. This is their identity on the network. Replacing the Gateway trashes all of these identities. Unfortunately, there is no general notice sent out asking that everyone return to the desk and get a new number. As a result there may be duplicates if new assignments overlap the old numbers because the new Gateway is not yet aware of the full client list. You can imagine the chaos as clients try to grapple with “I didn’t order that!”, “Where’s my order?”, “… isn’t answering my request”, and on and on while some clients are using the old numbers. Rebooting your items forces clients to return to the registration desk and get a new, unique number from the new Gateway.

A confusing complication is that these numbers are “leased” and clients must return to the desk periodically and renew their number. Leases are typically 24 hours, but Xfinity tends to use one week leases. As a user you could be struggling with the mayhem created by duplicate numbers, but as clients renew, the duplicates may be eliminated over time. This results in a user complaining that something was not working yesterday, but today everything is fine.

Your analogy is terrific! Really helps to understand what is going on inside.

I Removed the music folders. But when I tried to Add folders, I got the same message that my computer cannot be found. I know the computer name is correct, so why can’t Sonos see it?

Could there be a firewall in the new router that is blocking it?

How do I tell Sonos to work with my computer? And how do I tell my computer to let in Sonos?

I suspect that your computer is upset about the new Gateway. In the computer’s world, it’s a new network. You’ll need to get your hands dirty. Here is an article about setting up a “Network Share”.  I suspect that your computer defaulted to “Public” on the new network and access to network shares is blocked as the default security on this network. You have a “Private” network.

Windows 10 changed things a bit since the above SONOS article was published. I suggest that you right click on the windows icon on the bar and look for “System”. This will get you closer to where you need to go.

I thought I just sent a post but I don’t see it so I will repeat…

Before I saw your last post, I did more research and changed from Public to Private. I think you are right...my computer must have flipped to Public with the new router.

Then I went back to Sonos and it let me add Music folders, and updated my Music Library. I just played a few songs fom different Imported Playlists--no problems. I will do more testing tomorrow to see that everything is OK now.

Thanks so much for your help!

When your friend arrives have him or her set “reservations” for all of your regular network clients. This elevates these clients to a sort of VIP status and they will always be assigned the same address. This minimizes the risk of future duplicate addresses. As you read through the Community posts you’ll encounter lots of people who are struggling with indescribable, intermittent network issues, Most of these issues will go away after reboot and reservation.

Wireless issues are different.

Don’t believe those who are yelling “unstable product”. One might be able to (accidentally) get away with  blindly replacing a router 100 times in a row, but after 101, when things are unstable, the assumption is always that “something broke”. In reality their luck simply ran out, The regulars here don’t have issues from one year to the next. We use address reservations and proper Wireless setup.

Reservations and Proper Wireless Setup when I can get together with my helpful friend.

In the meantime, while it appears that Sonos is working well, I do notice that there are a few Imported Playlists that are no longer in itunes but are still showing up in Sonos. Yes, I have updated my music library several times. These playlists are not a problem...I am just curious.

I’m not an iTunes user. I did find this article that might give you or your friend a hint about what’s going on.

This article looks like just what I need to clean things up, since my Imported Playlists also contain several exact duplicate playlists in Sonos. I think the problem is that many songs are duplicated in several folders on my computer--it’s a bit of a mess. I have 2 Users on my computer--I don’t need 2. It will be a huge undertaking to straighten it all out...I will need a couple of rainy days and lots of patience. I am just happy that Sonos is working great right now, so there’s no hurry.

Thanks!