I have a new client with a pre-existing Cisco WRVS4400N v2 wireless router w/multiple VLAN. Sparing the details of the rest of the network, a SONOS Connect attached to a netgear unmanaged switch fed by one port of the Cisco will not work with either wireless controller clients on the same VLAN nor wired controller clients on the same unmanaged switch...Occassionally, the SONOS Connect will come up and become accessible [I managed a firmware update once] and occasionally the controller sees the Connect and attampts to control it, but then it falls offline soon after.

No other wired or wireless connected devices are having problems pinging each other or accessing the internet...SONOS is the only unhappy device.

I took the Connect home and tested it on my network to rule out bad hardware and it came up immediately and works normally.

Anyone have any experience with SONOS/Cisco WRVS series routers...? SONOS has no record of any tech calls for this series. Can anyone offer ideas about cause of SONOS falling off of otherwise functional network?

TIA

Here are some general setup considerations that apply to managed switches.

Is this CONNECT the only Sonos component?

If the router has a wireless access point of any kind and the radio in the router is turned on, you won't see the Sonos unless you're connected to the router's WiFi because the WAP is its own node and while you can ping the Sonos and other devices, it won't necessarily show up or be controllable. I just ran into this with an Arris gateway in a house where radio goes to die and I needed to use multiple Apple wireless devices (they already had them and didn't want to replace) for best coverage. Once I turned off the Arris WiFi and added another Airport Express in that location, the problems ended. I could see two of the Sonos Connects when I was in the area of the Arris, but the Sonos 3 in the kitchen was missing. If I was in the kitchen, I could see the 3 because it was connected wirelessly to the AP in that area.

The system has two Connects in the cabinet where the AV system is located along with the router and a receiver for the other speakers, with one Connect on the AVR and the other is on the receiver. One Connect is hard wired to the gateway and the second is connected to the second ethernet port on the other Connect. One port on the gateway connects to a Netgear Gigabit 8 port switch in the basement, which connects to two Airport Express, and an Extreme, as well as the access point for the U-Verse wireless TV receiver and a Cat6 to the basement AV cabinet, which has another switch for the AVR, AppleTV, Time Capsule, XBox One, U-Verse receiver and a cable to the TV, which isn't used at this time.

Once I turned off the WiFi on the Arris and installed the last AirPort Express, it cured the problems with losing the kitchen Sonos 3/not seeing the Connects in some areas and it also improved the range- I can drive by and pick up the SSID from the street without stopping, in front of both neighboring houses and that's pretty good, considering the heavy masonry exterior walls and metal lath & plaster interior surfaces in all areas.

Just one SONOS Connect.

I considered that the router may be imposing client isolation of wireless and wired clients (though I can find no setting to control this). But...I have the SONOS and a wired PC with Controller on two ports of the same unmanaged switch and it won't work...It's as if the Sonos isn't getting an IP address assignment from the DHCP server which, in this case, doles out addresses in the 192.168.20.1xx range. Fing shows all other wired devices except SONOS. We even tried forcing the Connect's Mac ID to a specific IP address from an elevated command prompt but no workum...

Oh well...Client is opting to replace the Cisco router (4 years old) rather than continue troubleshooting. Guess I'll never know.

What are the IP addresses for the other devices? I don't remember seeing a Cisco with anything other than 192.168.1.1 or xxx.xxx.0.1 for the gateway address, which should put the address range for the other devices the same 254 addresses and the second last octet makes me wonder if someone had changed the router's settings at some point in the past, before you became involved.

Yes...It had been heavily configured by the original POS vendor to serve as the security firewall for POS processing, etc. The POS system was recently upgraded and a separate hardware firewall installed. The POS integrator now disavows support of the Cisco and basically said all I needed to be concerned with was not stepping on the Static IP's of the POS server, NIC and firewall.

Three separate VLANs were originally configured with the two in the 192.168.20 and .30 ranges set with DHCP service but the third in the 10.0 range not DHCP. I setup the office .20 VLAN on the four local ports and hidden wireless SSID for office use and .30 VLAN for the guest wireless SSID and bridged the modem [which was also previously ALSO setup as a 4 port router with DHCP]. Inter-VLAN routing is turned off to keep the office and guest networks isolated, but, again, all devices on the .20 range are sharing the same VLAN in the same DHCP address pool.

All devices are online and happy except for SONOS and I'm able to see and ping all other devices on the same VLAN.

Stupid question-you got a link light on the switch and on the SONOS?

You tried a known working ethernet cable?

Yes--Link lights all good, brand new CAT 6 cables. The SONOS successfully pulled down a firmware update at one point and played a few seconds of music before dropping back off of the network.

POS- Point Of Sale, or the other meaning?

How many APs in this network? Are they all in that address range?

Your sonos is in an unmanaged switch, once the sonos drops offline does anything else on the switch drop?

could be the Spanning Tree on the Managed Switch is shutting off the port, or could be due to UDP traffic from the Sonos causing a broadcast storm