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Nest WiFi pro LAN wired connection gets half the speed

Mulargui
Community Member

Just received my 3 routers nest WiFi pro. Excited! My house is wired and connected them using a gigabit switch. I have a 1Gb fiber internet connection that consistently delivers 900-800 Mbps both for uploading and downloading.
I noticed the speed of my network was roughly half of what I have so started investigating the case. I used a PC with a LAN port to test the different wired components. It was easy to spot. If I connect my laptop to the modem port I was connecting the nest router I get full upload and download speed. If I connect my laptop to the LAN port on the google nest router I only get half the speed. On average is about 450Mbps, sometimes goes as high as 700 many times as low as 200. I also noticed download is half of uploading, it should be similar. Obviously everything behind this port (switch and points) are limited by these numbers.

Am I the only person seeing this behavior? If only me this should be a defective unit and just need to return it.

8 REPLIES 8

olavrb
Platinum Product Expert
Platinum Product Expert

There is this existing thread:

The only things I can think of you can check is:

1. What exact switch model? If it has conflicting features like loop detection (spanning tree protocol, stp, is an example of such a mechanism), disable it.

2. Do you run double NAT? It can cause strange problems and speed degradation. Make sure any ISP equipment in front is out in bride mode or bypass mode.

Disable all "preferred activities", no need for that QoS capability with such speeds from your ISP.

Other than that: Wait some days for Nest Wifi to settle, I've read that it can take some time for it to adjust to the actual WAN speed. There are some built in QoS, fq_codel, that should be disabled at a certain threshold. But those settings are not exposed to us customers.


I don't work for Google.

Mulargui
Community Member

thank you for your prompt response. My switch is a TP-Link TL-SG105 [1]. To note that my test only included a unit as router connected to the modem and to a PC using an Ethernet cable. Is a clean way to test the performance of the unit. Btw, I believe you are right and I have a double NAT. I will talk to my ISP but I’m not concerned about it, double NAT adds negligible nanoseconds in latency.

I factory reset everything and started from scratch using a different unit as router and testing the wired network at every step. After connecting the router to the modem and the switch (no points) I noticed a few things

1. The router learns. After a few tests it started delivering more bandwidth to the switch and ports. At the end I was able to receive 900 Mbps on each wired port.

2. The router optimizes for downloads. When testing uploading at best I was getting 2/3 of the bandwidth I was getting downloading. That makes sense if you have cable or ADSL which are asymmetric. I have fiber and is symmetric.

3. I connected a Mac Pro wirelessly using 802.11ax at 80 MHz and 1.2 Gbps Max but the router was unable to provide more than 600 Mb. I was at 4 feet of the router. I was expecting to get 950Mbps. This surprised me as I was expecting the router to shine this simple test.

afterwards I added two wired points. 
1. The system continues learning. After more tests with the laptop wired to the other port in the points I was able to get 900Mbps. This is promising because it means the wired network works and the nest devices are routing well.

2. Again a new disappointment when connecting wirelessly my Mac Pro  near the points. I never got more than 600 Mbps.

I will follow your advice and wait a few days to let the system to learn before taking any decision. Thank you for all your help and the pointers.

[1] https://www.amazon.com/gp/product/B00A128S24

Mulargui
Community Member

Adding a second note about STP/BPDU. My switch is unmanaged and has not such configs. 
Quick question: google home indicates that the points are wired . Does that prioritize the communication over WiFi?

olavrb
Platinum Product Expert
Platinum Product Expert

Backhaul travels exclusively over ethernet if detected.

Double NAT can cause more harm than just latency, at least with Nest Wifi. I speak of experience. So get that done before testing ogher thing, would be the next best step IMO.


I don't work for Google.

Jeff
Community Specialist
Community Specialist

Hey Mulargui,

 

It looks like olavrb was able to help you out on this one, but I wanted to check in and see if you were all set or to see if there was more you might need. If there's more I can do, just let me know.

 

Thanks,
Jeff

AbigailF
Community Specialist
Community Specialist

Hi Mulargui,

Checking back in should you still have some questions here. Let us know by replying to this thread. 

Best, 
Abi

AbigailF
Community Specialist
Community Specialist

Hello Mulargui,

We haven't heard from you in a while so we'll be locking this thread if there is no update within 24 hours. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the Community.

Regards, 
Abi

Schmalzy
Community Member

I've had mine since launch and I'm noticing the same thing. I have a gig plan from my ISP and I'm only getting 500-600 megabits per second over ethernet. Everything was fine with the Nest Wifi routers using the same settings.