On 4 Dec 2024, at 21:45, Ilya Maximets wrote:
> STT tunnel implementation was rejected in the upstream Linux kernel
> long time ago and will probably never be there. So, the only
> implementation for Linux is in the OOT kernel module shipped with
> OVS 2.17. It is deprecated and will reach end of life in Feb 2025.
>
> In addition, modern network interface cards support various hardware
> offload features with UDP tunnels, diminishing the main selling point
> of STT - the ability to reuse hardware offload features meant for TCP.
>
> Deprecate the port type now, so it can be removed once 2.17 is EoL.
>
> There is another implementation for this tunnel type in the Windows
> datapath. However, the protocol itself is considered harmful as it
> may confuse stateful network hardware by pretending to be TCP (hence
> the reason it was rejected in the Linux kernel). So, it is better if
> we deprecate this implementation and stop supporting it as well.
>
> The standard draft for the protocol itself is also expired and
> archived with the latest update made in 2016:
> https://datatracker.ietf.org/doc/draft-davie-stt/
Changes look good to me.
Acked-by: Eelco Chaudron <[email protected]>
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