Google wifi vlan tagging

[nevynevster]

Hi, I am having frequent dropout on my Google wifi setup. I was told this was double NAT. So I bought a modem to replace the modem/router provided by my ISP. 

I was then told it was vlan tagging and I needed a switch. So bought one of those. 

Now I am told my ISP needs to fix this. Not sure they think they have a problem so it's unclear what they will fix?

I am getting a bit fed up plus bought a shed load of kit. Any suggestions on how to sort this? I've reached the end of Google support. They have no more suggestions 

[olavrb]

What ISP, what modem, what switch, where do you live (country)?

How does your pathway from/ to the internet look right now? For me its fiber coming into my ISPs multimodem that I could bridge, as in get a WAN connection from one of its four ports. Untagged, just a public IP. With my Nest Wifi router connected straight to that port, and everything is good.

[nevynevster]

hi.

I am in UK and have a standard broadband (no fibre) via plusnet. 

This goes to a Netgear Dm200 which then goes to switch Netgear gs395e and then the Google Wifi. 

I did originally have the Google plugged into the ISP modem/router but was advised this caused double NAT problems so needed a modem only solution hence the Netgear. 

[olavrb]

According to Netgear documentation, all you should need to do is to set the DM200 in bridge mode like so:

https://kb.netgear.com/30773/How-do-I-set-my-NETGEAR-DM200-High-Speed-DSL-Modem-to-bridge-mode

If you've set it to bridge mode and connect your PC straight to the DM200 afterwards, what IP do you get? What about Google Nest Wifi, what IP does it report that it gets? Can be seen from the Google Home app. If it gets a local IP (https://en.m.wikipedia.org/wiki/Private_network), it's a good indication that you are in fact getting double NAT.

[nevynevster]

Thanks for the suggestions. Will try tomorrow.. I am fairly sure I've done the bridge mode but haven't checked the IPs

[Jeff]

Hi, nevynevster.

I just wanted to check in and follow up real quickly in here. Were you able to get this sorted out for you? If there's anything else we can do, just let us know. Also, big thanks to olavrb for your help on this! 

[nevynevster]

Hi. Yes it is in bridge mode if that is what Modem only mode is. It is not acting as a router. 

I have an option to set Passthrough vlan but that is not ticked. Not sure if that's something to worry about 

[nevynevster]

The app is reporting 192.168.86.1 as LAN IP. 

[Jeff]

Hi, nevynevster. 

Thanks for the follow up. The reported IP address is indeed your local IP. So as olavrb mentioned, it is a good indication that you are dealing with a double NAT situation. I'm sharing below the instructions for how to address a double NAT on your network. You can find that here: https://bit.ly/3k7Hhmv

Once you've taken a look at that article and put into place the workaround for a double NAT, see if you can get everything running properly. If you're still having issues, please come back and let us know.

Thanks.

[nevynevster]

Hi. Thanks for the reply. I do have the modem in bridge mode and always have and so am a bit confused how I still have double NAT. I checked the instructions on the link but they say to make sure you have modem in modem only and that's what I have done so unsure what I am to do. The only other solution is to put the Google in bridge mode but this was not recommended. 

[Jeff]

Hi, nevynester.

Bridge mode is not recommended, but in some cases and with some setups it is necessary. At this point, it's probably worth giving it a try to see if it works. If you're having trouble after that, then the issue might be related to something outside of the double NAT, but I would suspect things will work at that point.

If things are still not working from there, please let me know. Thanks.

[Jeff]

Hi, nevynevster.
I just wanted to check in real fast to see if you saw my reply and to find out if you still needed any help on this. If you're still needing assistance, please just let me know and I'll be happy to continue helping.

Thanks.

[Jeff]

Hi, everyone.
As we haven't had any activity here recently I'm going to go ahead and close the thread. If you have more to add, feel free to start a new discussion.
Thanks