TCP IPV6 causing slowdowns on Windows 11 wireless connections

[MymsMan]

For several days I have been trying to track down the cause of varying download speed when using wireless connections to the eero hub.  After several false leads I found pages  on Google suggesting disabllng TCP IPV6 in my WiFi adapter -  I tried that and have had 24hours of consistently high speed test results since then.

Diasbling TCP IPV6 is OK as a workaround but is not recommended as a long term solution.

Are there any settings in Windows or the Eero that that will allow for high speed downoads with TCP IPV6 enabled?

Is the problem a bug in Windows and/or the Eero

[PeteG]

Hey there. 

Oh, it's good that you've found a temporary solution to the issue. I haven't come across the issue before, and if the windows machine is the only wireless network device that's actually having the issue, I'd assume it's an issue with windows, or the wireless adapter on the machine. 

It might be worth checking the wireless settings on that device, as well as checking the drivers are up to date. It might be worth just reinstalling the drivers to be on the safe side. 

Pete.

[MymsMan]

I tried updating the wireless adapter driver and that resulted in my download speeds being cut to around 40Mbps 👿,   I have rolled back to my previous drivers and reported the issue on the Intel forums.

I think the IPV6 issue may be an eero issue,  I have also needed to disable it on the other windows PCs in the house which use different makes of wireless adapter.

Also if you Google "eero 6 tcp ipv6 slow" you will find numerous references to slow downs when IPV6  is enabled with an eero router.

I haven't tried the effect of disabling IPV6 on the eero router or trying speed tests on Android devices