Some Internet Service Providers (ISPs) require VLAN tagging in order for their modems to communicate with wireless routers. VLAN tagging is not supported by Google Nest Wifi or Google Wifi and can cause your setup to fail.
To confirm if your ISP uses VLAN tagging, or if you have IPTV or VoIP service through your ISP, check with your ISP.
Use Google Nest Wifi or Google Wifi with a VLAN-tagged broadband connection
In order for Google Nest Wifi or Google Wifi devices to work, you will need to add a switch to your network or use an additional VLAN-supported router.
Use a managed network switch
Add a separate managed network switch (sometimes called a 'smart' network switch) with VLAN features.
- Connect your modem’s LAN port to the switch’s WAN port with an Ethernet cable.
- Connect the switch’s LAN port to your Google Nest Wifi routers or Google Wifi primary points WAN port with an Ethernet cable.
- When finished, set up your Google Nest Wifi or Google Wifi in the Google Home or Google Wifi app.
Use a VLAN-supported router
If you have a router already connected that supports VLAN tagging, you can add your Google Nest Wifi router or Google Wifi primary point to it.
- Connect your modem’s LAN port to the third-party router’s WAN port with an Ethernet cable.
- Connect the third-party router to the Google Nest Wifi router or primary Wifi point's WAN port with an Ethernet cable.
- When finished, set up your Google Nest Wifi or Google Wifi devices in the Google Home app.
With this configuration, you may run into double NAT, which isn't necessarily a problem. But if it is causing problems, we recommend putting your third-party router in bridge mode and turning off Wi-Fi on your third-party router to avoid interference.