Two suspect NICs at this point: - Intel® 82579LM found in some HP laptops. Disabling the IPV6 TCP checksum offloading resolves the problem. - Realtek RTL8111E - The problem is inconsistent
-----Original Message----- From: Ryan Rawdon [mailto:[email protected]] Sent: November 18, 2015 09:22 PM To: Clinton Work Cc: [email protected] Subject: Re: Windows NIC/driver issues with IPV6 TCP checksum offloading > > 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?
