Internet Speed Drops to 90Mbit After ~24hrs

[GPLama]

I have a 1000/50 fiber service that works as expected (~900/47 on a good day) that will drop to 90Mbit downlink after around 24 hours from power-up. It will remain at 90Mbit until I power cycle the Google Nest Router at which time the downlink speeds return to the expected speeds. 

I've done a number of things in an attempt to troubleshoot this... I've changed Internet providers, cabling, etc. The fact that the Nest Router works as expected for around 24hrs before lowering the speed and that I can resolve this with a reboot of the device has me finally seeking answers from Google support on this one... (I had assumed it was rate-limiting at the ISP... it's not). 

The speed tests to determine this issue are being done with both the Google Home app and loading Fast .com on directly connected devices. 

Device info: Model: H2D. Software Version: 14150.376.32 

Ideas/suggestions appreciated! 

[AbigailF]

Hey GPLama,

Thanks for posting. I’m sorry to hear that you’re having this issue. 

I understand that you’ve done several troubleshooting steps like power cycling, changing Internet service providers, checking cables and more. Could you list any other troubleshooting steps that you’ve done? I’d like to make sure everything is exhausted before we move on to the next step.

We’ll wait for your update.
 

Best,
Abi

[GPLama]

Thanks for the reply Abi. I've outlined everything I've done to date. I've resorted to rebooting the Nest router every 24hrs or so as a work-around. 

[LovelyM]

Hello everyone,

I just want to give you a nudge. How is it going? Do you still need help? I want to make sure your Google Nest Wifi devices are already working as they should. Kindly reply to this thread if you still need help.

Kind regards, 
Lovely

[GPLama]

I've implemented all the troubleshooting suggestions as outlined by AbigailF and have again encountered the issue with the downlink being restricted to ~90Mbit/s. Uplink remains unaffected. Soft resets using "Restart Network" from within the Google Home app did not resolve the issue. I did a connection kick and port reset from the ISP forcing the connection to reauthenticate, issue still persisted. The resolution again was a hard reset by powering off the Google Wifi router and powering it back on again. My downlink has returned to 700Mbit+. 

[brinkmanjg]

I’ve had this same issue for around eight months now. Model AC-1304, version 14150.376.32.

I don’t see any options that might help, and my ISP is of no use. I’m just in the habit of restarting the device every day, which is not what I would expect from a Google product.

[AbigailF]

Hi folks,

Appreciate the update. Apologies for the late reply. Please try the troubleshooting steps below:
 

• If you're using a modem/router combo, set that to bridge mode to avoid double NAT issues.
• Make sure that there is minimal to no interference (concrete, bulletproof glass, metal, mirror, etc.) and the points are no more than two rooms apart.
• Remove any special characters in your network name and password.
• Turn off IPv6.
• Change your DNS server into 8.8.8.8 on the primary and 8.8.4.4 on the secondary server. Hit the save/ floppy disk icon on the upper right.
• If the issue persists, try factory resetting your network. Take note that this will delete all network data.

Let us know how it goes. We’ll wait for your feedback.
 

Best,
Abi

[brinkmanjg]

Someone in another thread suggested disabling Video Conferencing under Preferred Activities in settings. This worked for me. My speed did not drop all week. I don’t know how this feature is supposed to work, but it seems to cause major issues.

[GPLama]

Interesting! I've just switched that off and done a power cycle. 800Mbit+ downlink with a speed test. I'll monitor this for a few days. 

[AbigailF]

Hey everyone,

Just checking in. Have you monitored your network speed a few days after disabling options in Preferred Activities? How was it? We'd like to make sure everything is all set.
Thanks for helping out, @LovelyM.

Cheers,
Abi

[brinkmanjg]

Disabling Preferred Activities solved the my issue. There is obviously a bug in the implementation.

[LovelyM]

Hello there,

Thanks for sharing this resolution that works for you, @brinkmanjg and @GPLama. I'll raise this with our specialist team. I'll keep this thread open for three more days. Keep us in the loop if you ever experience slow speed on your WiFi network again.

If you have additional questions in mind, let me know. 

Many thanks,
Lovely

[LovelyM]

Hi everyone,

I want to see if you still need help. Don't hesitate to tell me if you have other questions or concerns. I want to make sure you're all good to go.

Best,
Lovely

[LovelyM]

Hello folks,

It looks like we've slowed down here. We'll be closing up the thread in the next day unless anyone else has any input or needs anything else. If so, just let me know and we can keep this open a bit longer.

Thanks,
Lovely

[GPLama]

Since switching off the 'Preferred Activities' feature my Google Nest router has not encountered this speed cap issue for the last six days. This is a huge improvement over the ~24hr cycle or so it would limit the connection to 90Mbit/s. I'm still not entirely confident this is the solution, but it is the best performing 'fix' I've attempted to date. 

[LovelyM]

Hi GPLama, 

If you are not confident about this solution, we can continue keeping this thread open for an additional three days. You can update me anytime if your internet speed drops so I can continue to assist you. 

Regards, 
Lovely

[LovelyM]

Hello GPLama,

It's me again. I want to check if you noticed any inconsistencies in your internet speed during the last three days. Feel free to tell me how your network is going.

Cheers, 
Lovely

[GPLama]

Thanks for the follow-up. I've just performed another test and the Internet downlink speed is as expected. This is now nine days since switching off the 'Preferred Activities' feature my Google Nest router. I suspect this may be the resolution. 

[LovelyM]

Hey GPLama, 

I appreciate you checking this out for me. It looks like we can consider this one complete; I'll go ahead and lock this thread in the next 24 hours. If you ever encounter any issues with your Google Nest Wifi devices, feel free to start a new post and I'll be more than happy to help. 

Many thanks, 
Lovely