Nest Wifi VLAN Connection issues

Not sure this is the appropriate community here. We could certainly help finding such configurations for 3rd party routers and the BT Internet connections where VLANs are used.

BT has different platforms and Internet connection styles - so without more details it's hard or impossible to help. Could be two wide DSL, could be FTTP/FTTC with an ONT, ...

Much better place would be the BT Community. Here a recent talk on this subject -> FTTP and Google Nest Wifi router (love the part where somebody wrote "There are numerous posts on the forum with regard to this nonsense that Google seem to be spouting as the cause for all problems. They are totally clueless." Looks like this is the root of your rabbit hole.

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sjd101 wrote:

Been having issues with Nest Wifi dropping. 

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Not clear what you are describing here. Your Nest WiFi does run overall, and you experience WiFi drops on some/all devices, e.g. ner to the router, or ner to the sattellite units?

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sjd101 wrote:

Contacted Google Support who said it was a Double NAT issue. 

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A WiFi system with a router can work, regardless of there is any customer sie double NAT, e.g. a BT hub and the Nest router. Unless one of these routers does work badly, the Internet connection isn't badly affected. There are some limitations in double NAT configurations, but you need this only if you run services or need direct access to some systems on your LAN direct from the Internet  Double NAT does not make WiFi drop....

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sjd101 wrote:

I needed to plug Nest into a Switch between my router/modem and Nest.  Also had to buy a BT Business Hub as they said Hub needed to be put in Bridge mode in order that it acted only as a modem.  Put PPoE settings into Nest and away we went.

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This does proof my suspicion! With the BT Business Hub in transparent bridge mode, and still experiencing WiFi dropping under some conditions, ... it's not likely a problem with double NAT, or the "outer" BT Business Hub.

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sjd101 wrote:

Still had issues so went back to them.  Apparently BT as well as most UK ISP's use VLAN Tagging.  So Google told me switch needed to be managed.  So bought GS324T.  This is where I knew it would become difficult as I had no idea how to configure the switch.

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Appears you try to replace the BT Hub (NAT router) and the current installed BT Business Hub now.

What is coming to your house/appartement/office?

• an Openreach modem (ONT), or
• a Fibre Optic Broadband: Getting Connected - BT Equipment (be aware this is information from another ISP - but the port on the wall might be similar) - the interesting point is that there can be VLAN tagging required, or not...

Once you figured out what you have, and what VLAN config you need on the switch (one dedicated VLAN, one port tagged to the "Internet-side", one untagged to the Nest router) we're happy to provide some guidance.

For my part, I doubt this would magically fix these undefined WiFi dropping issues I'm afraid.