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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 03:00 UTC

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From: Tom Herbert <tom@herbertland.com>
Date: Mon, 01 Jul 2019 20:00:42 -0700
Message-ID: <CALx6S35XUKbLKTmh3r5Zk2eEe27_c3NH1T56_cF2uVihFVa8yQ@mail.gmail.com>
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, 6:57 PM Joe Touch <touch@strayalpha.com> wrote:

>
>
> On Jul 1, 2019, at 6:12 PM, Tom Herbert <tom@herbertland.com> wrote:
>
> >>> 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?
>
> Yes. I find it ironic that you care so much to ensure that the checksum
> validates addresses and ports that nats change and here you’ve found a true
> error that you want to cover up instead of fix.
>

What is the "true error" to which you're referring?


> Joe
>

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