My recollection here is (quite) hazy, as it's been a while, but it's likely 
that this was a transcription error. The set of hash types was largely modelled 
on what Chelsio offered in the T3 (if I recall), and also what was documented 
in the Microsoft RSS white paper, so it may be worth taking a look at those 
sources to see if something makes itself obvious.

(There do seem to be some odd variations in hashing types supported by various 
NICs -- e.g., hashing but with different hash algorithms in certain generations 
of cards, etc, so it also wouldn't surprise me if it did correspond to 
something real. Clearly the comment is not good enough to explain that, if so!)

Robert

> On 2 Sep 2017, at 00:43, Adrian Chadd <adr...@freebsd.org> wrote:
> 
> Hi,
> 
> I seem to recall it was something some chipsets supported? I forget the 
> details.
> 
> 
> 
> -adrian
> 
> 
> On 30 August 2017 at 00:07, Sepherosa Ziehau <sepher...@gmail.com 
> <mailto:sepher...@gmail.com>> wrote:
> IPv4 UDP with extended headers o_O?  Or it was just a mistake.
> 
> Thanks,
> sephe
> 
> --
> Tomorrow Will Never Die
> 

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