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Xfinity Modem/Router and Google Mesh Network - Can the two WiFi networks be connected?
I have an Xfinity modem/router which I've had for several years. I have computers and other devices hardwired via ethernet as well as having some mobile devices on that same subnet using WiFi. These devices operate on the 192.168.22.xxx subnet (not my real subnet, but an example).
A few months ago I purchased a Google Mesh WiFi system to expand the WiFi coverage throughout the house and garage. It's working fine, but when I installed it, the Google Mesh system created a new subnet - 192.168.88.xxx. The Google Router is hardwired into the Xfinity modem/router, so all the devices on the .88 subnet have access to the internet.
While everything is generally working fine - i.e. all devices have access to the Internet - there are times when I would like a device on the .22 network to see a device on the .88 network (and vice versa). But trying a 'ping' from one device to another doesn't work. Can the Xfinity router be configured to tie these two WiFi networks together? Or do I need to create a separate router to enable to two WiFi networks to see each other?
Thanks.
flatlander3
Problem Solver
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1.5K Messages
3 years ago
What you have now is a called a 'double nat'. Xfinity gateway isn't going to be able to route between the subnets (or any other gateway).
IT geeks cringe, but that's fine and will work for most things. But there isn't going to be communication between subnets, UPnP and P2P are going to be problematic in the Mesh network, and port forwarding is also going to be goofy if you are trying to expose a mesh networked device to the outside world (gaming...service you want to run...etc.).
Another way would be to expand your mesh network and put everything on that. Xfinity gateway is set to bridge mode, you don't use the WiFi on that, and just use your expanded mesh network.
I don't know if you can set a google mesh to do it the other way -- Turn the mesh/router into just a regular access point (disable WAN, disable it's DHCP server, set DHCP forwarding to your gateway). Model numbers are useful. You'd have to take a look at the manual to see what it can do. Maybe that's not possible with the equipment.
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