Main Nest WiFi Pro not connecting to ISP modem

[ale_cassa]

Dear Communty,

I just purchased a 3-pack nest Wifi Pro in the hope of having a reliable Wifi Mesh network.
Enviorement: 3 story house (rental), the ISP modem is placed in the hallway (groundfloor) where the fiberglass come in (it can't be moved). From the closet where the modem is located, the house owner has 2 utp cables that go through the house one in the living room in one unused corner (ground floor, next to the hallway) and one on the top floor.

So I thought it was a good idea to place one router per floor. The main router is supposed to have in the WAN port a UTP cable that goes directly into the modem, I thought great! I'll just use the living room utp cable to connect it "directly" to the modem in the hallway. So I thought of placing the Main nest wifi router next to the PS5 and then connect it to it wiredly (I hoped in wired performance this way). This meant having a almost 15meter utp cable going from the UTP socket in the living room all the way to the PS5 location, and adding up the lenght of the upt cable that goes to the hallway closet it should be something like 35ish meter total of cable lengt Nest wifi router > ISP Modem. 

Didn't work: By setting up the router in the home app it would just not get internet connection. When I looked in the ISP modem socked where the cable is plugged in there's no lights, aka no communication. I checked the cable on the end of the 15 meter with a laptop and works fine. 

TL;DR: Learnt the hard way, as shown in google's own instruction video that the Main nest wifi pro router has to be directly connected really close to the isp modem with the provided (20/30cm) utp cable.

Now I have 2 routers on the ground floor (close to each other) one on the middle floor and none on the top floor. This doesn't seem the most efficient way.
So I wonder if anyone else also has encountered a similair issue or usecase, and if there's a more efficient way?
Thanks in advance.

[olavrb]

You should not be limited to 20-30cm, no. I use a 2m CAT6a cable.

As long as you connect the main Nest Wifi unit WAN port directly to the modem, with a working gigabit (1000mbps) ethernet cable within specs of the given ethernet CAT version, it should work. Preferably CAT5e, as CAT6 and CAT6a are stiffer, which can cause connection issues due to the tight cable routing on Nest Wifi units.

Just in case it's useful, here is a diagram I made which shows how to wire up a wired backhaul.

• https://www.googlenestcommunity.com/t5/Nest-Wifi/Ethernet-backhaul/m-p/284073/highlight/true#M31892

[ale_cassa]

Thank you for your reply!
 That's what I thought, I must have done something wrong. By the way I checked the cables and the one that passes through the wall its a CAT6, and the one in the living room from the ethernet outlet to the desired location (15m) was a CAT5e. In a setup like that would that not also count as wired direcltly?

[AbigailF]

Hey folks, 

Thanks for lending a hand, @olavrb.
@ale_cassa, it still counts as a wired setup. Apologies for the late reply. I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any concerns or questions from here, as I would be happy to take a closer look and assist you further.

Thanks,
Abi

[EmersonB]

Hi everyone,

@ale_cassa I'm dropping by to ensure that everything is covered here. How's it going with your Nest Wi-Fi Pro? In case you have an update, you know where to find us.

I appreciate the help, Abi and olavrb.

Regards,

Emerson

[ale_cassa]

Hi @EmersonB and @AbigailF,

Thanks for dropping by. In the end it all made sense. The problem was the cable that ran through the wall. So all my theories just came down to that. I'm getting the cable changed.

Thanks anyways.

[EmersonB]

Hello ale_cassa,
 
We appreciate you getting back to us and for sharing with us your update about the issue. Let us know if you have other questions from here.

Thanks,
Emerson

[AbigailF]

Hey ale_cassa,

We’d like to check in again in case you have any further questions or concerns. Feel free to reply to this thread and we’ll help you out.

Best, 
Abi

[AbigailF]

Hi ale_cassa,

As we got our resolution here, I'm going to mark this thread as resolved. I'll be locking this thread if we won't hear back from you in 24 hrs. Should that happen, feel free to create a new one if you have more questions or have other concerns in the future.

Cheers,
Abi