> 
> On Nov 18, 2015, at 4:17 PM, Clinton Work <[email protected]> wrote:
> 
> Since rolling out dual-stack IPV6 to our consumer Internet customers, we’ve 
> had a couple of customer incidents with very slow IPV6 TCP performance to 
> dual-stacked websites (facebook, Wikipedia.org, …).   The problems only 
> occurs with Windows 7/8/10 PCs connected via Ethernet NICs.   Disabling IPV6 
> TCP checksum offloading will resolve the performance issues in some cases, 
> but not in all cases.   We have tried updating the Windows NIC driver to the 
> latest version, but that didn’t help.   I’m wondering if anybody else has 
> seen this issue with Windows PCs.   
>  

Have you noticed any patterns in what chipset (Intel/Broadcom/NVidia/etc) may 
be involved?

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