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Re: [tsvwg] draft-ietf-udp-options issues from IETF 104

Tom Herbert <tom@herbertland.com> Thu, 18 July 2019 15:35 UTC

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From: Tom Herbert <tom@herbertland.com>
Date: Thu, 18 Jul 2019 08:35:41 -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] draft-ietf-udp-options issues from IETF 104
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On Thu, Jul 18, 2019 at 8:27 AM Joe Touch <touch@strayalpha.com> wrote:
>
>
>
> > On Jul 18, 2019, at 8:08 AM, C. M. Heard <heard@pobox.com> wrote:
> >
> > > Also, note that IPv6 included bits to encode whether ICMPs were sent (and
> > > whether the source is multicast).  We haven’t addressed that can of worms
> > > yet either...
> >
> > Nor will we, presumably, since UDP has no analog to ICMP messages.
> >
> > Mike
>
> UDP can cause ICMPs to be issued as per RFC1122.
>
Not the ICMP errors to which Mike is referring to when IPv4 node
detects unrecognized HBH or Destination Option . Those are Parameter
Problem ICMP errors with code 2 "unrecognized IPv6 option encountered"
so they are not applicable here.

A single bit in the option type to indicate that the option can be
skipped if unrecognized should be sufficient.

Tom

> Joe
>
>

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