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Re: [tsvwg] UDP Options: on forcing the use of UDP CS=0 in connection with FRAG+LITE

Tom Herbert <tom@herbertland.com> Tue, 02 July 2019 01:12 UTC

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From: Tom Herbert <tom@herbertland.com>
Date: Mon, 01 Jul 2019 18:12:07 -0700
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To: Joe Touch <touch@strayalpha.com>
Cc: "C. M. Heard" <heard@pobox.com>, TSVWG <tsvwg@ietf.org>
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Subject: Re: [tsvwg] UDP Options: on forcing the use of UDP CS=0 in connection with FRAG+LITE
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On Mon, Jul 1, 2019 at 5:40 PM Joe Touch <touch@strayalpha.com> wrote:
>
> .
> On Jul 1, 2019, at 5:35 PM, Tom Herbert <tom@herbertland.com> wrote:
>
> >> So why would not including these fields matter?
> >
> > Because it matters to UDPv6.
>
> In a world with NATs that recalc CSs, it doesn’t.  It just checks that the NAT sw implemented the update.
>
Is that the same world where 24-36% of paths drop UDPv6 packets with
zero checksums as Mike reported?

Tom

> Joe

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