nanog mailing list archives
Re: VZ FIOS and Intel TCP IPv6 Checksum Offload problems
From: Sean Donelan <sean () donelan com>
Date: Mon, 29 Aug 2022 11:59:58 -0400 (EDT)
On Sat, 27 Aug 2022, Michael Thomas wrote:
In some situations where a client machine is connected via some specific Optical Network Terminals (ONTs), and data is appended after the packet checksum, the network adapter can drop receive packets when using TCP-IPv6 Checksum Offload for receive traffic.My reaction is "offload from what"? Isn't this all done in silicon?
Because the interoperability flaw is in silicon, it can't be easily fixed in either the legacy wired Intel ethernet controller or fiber ONT. Would need to replace the hardware to fix the silicon.
Need to disable the hardware IPv6 TCP checksum offload, so its not mangled or dropped at the silicon layers anymore.
Its annoyingly intermittent and not visible with client-based Wireshark because the corruption occurs in the hardware controller.
Current thread:
- VZ FIOS and Intel TCP IPv6 Checksum Offload problems Sean Donelan (Aug 27)
- Re: VZ FIOS and Intel TCP IPv6 Checksum Offload problems Michael Thomas (Aug 27)
- Re: VZ FIOS and Intel TCP IPv6 Checksum Offload problems Mel Beckman (Aug 27)
- Re: VZ FIOS and Intel TCP IPv6 Checksum Offload problems Michael Thomas (Aug 27)
- Re: VZ FIOS and Intel TCP IPv6 Checksum Offload problems Sean Donelan (Aug 29)
- Re: VZ FIOS and Intel TCP IPv6 Checksum Offload problems Christopher Morrow (Aug 29)
- Re: VZ FIOS and Intel TCP IPv6 Checksum Offload problems Brie (Aug 29)
- Re: VZ FIOS and Intel TCP IPv6 Checksum Offload problems Niels Bakker (Aug 29)
- Re: VZ FIOS and Intel TCP IPv6 Checksum Offload problems Mel Beckman (Aug 27)
- Re: VZ FIOS and Intel TCP IPv6 Checksum Offload problems Michael Thomas (Aug 27)