Unable to change Google Wifi LAN IP

[Cparias]

My internal lan, on the isp router is based on 10.0.0.x ( I set it that way several years ago). And it has worked well since then, for either DHCP obtained IPs or static IPs on my home devices.

It serves DHCP from 10.0.0.201 to 250.

I also have one access point that also extends to far rooms and works well with these 10.0.0.x IPs.

Got a set of two Google wifi mesh devices.

Google WiFi gets it's wan ip as 10.0.0.213 via DHCP to my router and sets it's lan ip to

192.168.86.1 and does DHCP serving from .20 to .250

When I connect my phone to ones of the Google WiFi devices I get connected but no internet. The ip I got on the phone is 192.168.86.44 which is on the range assigned by the Google WiFi main device.

As I understand, my phone does not connect because it is not on the same network as my router's lan.

So I tried to set a custom lan on Google WiFi config to 10.0.0.70 and DHCP from .71 to .89, saved. But it does not stick. It reverts back to 192.168.86.1.

There has to be a way to change the mesh lan config. Please assist.

[olavrb]

Custom LAN IP won't save if in conflict with the WAN IP.

But sounds like a double NAT issue. Nest Wifi is a home router too, with firewall, DHCP, DNS. It's recommended to bridge the equipment in front of the first/main Nest Wifi unit. More on double NAT:

• https://dongknows.com/double-nat-vs-single-nat/
• https://support.google.com/googlenest/answer/6277579?hl=en

[Cparias]

1. Why would the custom LAN on the GWifi router conflict with the google wifi WAP IP?

The GWifi WAN IP is 10.0.0.213, which is assigned by my ISP router's DHCP server within its range.

I am trying to config the new GWifi router's (or main Gwifi) with a static internal LAN IP of 10.0.0.70 and its DHCP server to assign from 10.0.0.71 to 89. this new GWifi DHCP range does not overlap with my ISP router's DHCP range which goes form 201 to 250. No other device within my original network has 10.0.0.70.

2. Google advertises the Wifi router/mesh as designed to "work with your/any ISP to extent your network".

My network is what I had with my ISP already. I want to extent it to other areas of my house without affecting (but interacting with) what i have, but Gwifi can't even use its obtained WAN IP (10.0.0.213) to get thru the ISP router and connect to the internet, instead, it creates a separate network (192.168.86.x), which, first does not provide access to the internet, second would not allow its devices to connect with my previous devices connected to my original network, like printer or even desktop or laptops .

Why do you think it can't go thru to the internet, if its WAN IP is 10.0.0.213? even if its internal LAN is 192.168.86.x? There seems to be some design flaw there.

If users have to mess with the ISP's router confg more than simple LAN IP setup, then users might lose support form them.

I think all the config must be done within the GWifi config for it claim it is easy to setup.

[Cparias]

BTW, thanks for your assistance with this.

[olavrb]

1. I don't know the inner workings of how Nest Wifi does subnetting, but I assume it wants a /24 CIDR range. Then you have a conflict.

2. Where does it say that? Point me to it, and I'll send it to Google community managers. Nest Wifi needs to be in router mode for wireless mesh to work. Unlike alternatives like Ubiquiti UniFi, TP-Link, Netgear. But a jank workaround exist, if you search for Nest Wifi + pi-hole, might be an alternative. Here:

• https://www.reddit.com/r/GoogleWiFi/comments/mkvl59/pi_hole_with_google_wifi
• https://www.reddit.com/r/GoogleWiFi/comments/ifth3x/nest_wifi_how_to_use_pihole_dns

The short answer for how to get Nest Wifi to work reliably is to bridge the ISP equipment. If that's not an option I'd look for some other Wi-Fi solution.

[Cparias]

I'll investigate the bridge option.

Thanks again.

[Alex_S]

Hi everyone,

Thanks for the help here, @olavrb. 
 

@Cparias, I hope you've got the answer you're looking for. If you're still in need of assistance, please let us know, as we would be happy to answer any questions you may have.  

Kind regards,
Alex

[olavrb]

I think we'd like to know what "rules" we have to play by when setting a custom LAN IP. Subnet mask/size. Valid IPs (RFC 1918 only?). Doc does not say anything about it.

[LovelyM]

Hello everyone,

Thanks for the additional information, @olavrb.

@Cparias, I'm checking in to see if you still need help. Please tell me if you have other questions or concerns. I want to make sure you're all good now.

Cheers,
Lovely

[LovelyM]

Hi Cparias,

We want to ensure you are good to go. Please reply to this thread if you still need assistance so we can give you a helping hand.

Cheers,
Lovely

[LovelyM]

Hey Cparias,

It's me again. I'll be locking this thread in the next 24 hours. If you have new issues, updates or discussion topics, feel free to start a new thread here in the Community.

Sincerely, 
Lovely