Re: SMTP and IPv6

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--On Saturday, June 29, 2024 14:00 -0400 Keith Moore
<moore@xxxxxxxxxxxxxxxxxxxx> wrote:

> 
> On 6/29/24 13:14, John C Klensin wrote:
>> 
>> --On Saturday, June 29, 2024 09:54 -0400 Keith Moore
>> <moore@xxxxxxxxxxxxxxxxxxxx>  wrote:
>> 
>>> On 6/29/24 08:20, John C Klensin wrote:
>>> 
>>>>   From my point of view, this is mostly about the IETF's
>>>>   credibility when we establish standards and at least
>>>> implicitly encourage others to use them.  If we do not or cannot
>>>> use those standards in our own work, and avoid doing so without
>>>> public and understandable explanations, it calls everything we
>>>> are doing into question.
>>> +1
>>> 
>>> But I want to go further than that.   If IETF insists that it
>>> needs to outsource essential services that are based on IETF
>>> protocols, that doesn't speak well for those protocols.
>> Keith,
>> 
>> The reason I am suggesting a careful, public, and fairly prominent
>> explanation for our decision to outsource to an organization that
>> does not support IPv6 (for email in this case) is precisely to
>> separate the protocols and their quality/ usability/
>> appropriateness from what is essentially an administrative (maybe
>> economic as well as management) decision.   I think it is also
>> appropriate for us to make it clear that we would be much happier
>> with the chosen vendor/ supplier if they supported mail (and other
>> protocols) over IPv6 even if other considerations (including "no
>> one we could find is any better about that") dictate that we
>> choose them anyway.
> 
> Not buying it, or at least, I disagree.
> 
> Let me first say that I find it highly inappropriate for such
> decisions to be made without input from the broader community,
> since basically those choices present a danger of undermining
> IETF's core mission.

In principle, we actually do not disagree on that one.    I do,
however, see a difference between decisions that have strategic
impact on the IETF or on the Internet more generally and ones that
are primarily or entirely administrative or operational.  I don't
think it would serve anyone well for the community to get bogged down
in, or try to micromanage, the latter.  At the same time, the
boundary line is a bit faint sometimes and, for many cases, I have
doubts that there is clear consensus in the community about where it
lies.  To make things even more complicated, while I understand and
sympathize with the reasons, I think the LLC sometimes confuses
having a discussion on the tools list and/or asking the IESG with
discussion and rough consensus in the broader community.
 
>> It seems to me that, in the above, you are making a different
>> argument, i.e., that the IETF should not be outsourcing _any_
>> important ("essential") service that runs on the Internet since
>> substantially every protocol is either our work or resting on it.

> I'm not actually making that argument.   I see a big difference
> between outsourcing services used by the general public (which has
> become MUCH larger in, say, the past 20 years), versus outsourcing
> services used primarily by IETF participants, which is I believe
> somewhat smaller than it has been at some points in the past.

I am not sure I understand what you mean.  For example, measured by
any of number of senders, number of recipients, or number of
messages, email is used much more by the general public than by IETF
participants.

>> While I got started a bit before you did, I was convinced for many
>> years that one of the main attractions of the Internet architecture
>> (and, to only a slightly lesser degree, the ARPANET with NCP and
>> friends before it)  was that they enabled local services and peer
>> to peer protocols rather than relatively tiny client machines and
>> giant, sometimes distributed, servers.   I am still not convinced
>> that putting everything into centrally managed "cloud" servers is
>> the right thing to do, especially when I see efforts to change and
>> optimize protocols for that model in ways that could impede or
>> disadvantage more distributed models..   I even draw  some comfort
>> from seeing things as cyclic, going back to the early iterations of
>> single whole-institution (or cluster of institutions) servers
>> evolving toward departmental machines and then to departments
>> discovering they didn't really want to be in the computer
>> operations business and centralizing some things as a result.  But
>> it is unquestionably today's reality and it is not at all clear to
>> me that asking the IETF LLC to fight that reality (and presumably
>> expand its staff even more to do so) would be in the best
>> interests of either the IETF or the Internet more generally.
 
> Anytime someone cites something as "reality" it should raise a red
> flag.   It's too easy to make the leap from such a label to
> conclude that "reality" isn't malleable, it cannot change, it's
> beyond our control or influence.

That is fair.  However, in this case, some of the specifics mentioned
by others -- such as the increased likelihood of messages coming from
systems hosted by very large operators getting through, I think the
term is correct.  That doesn't mean I like it any more than I think
you do.

>   We should at least be asking
> "Why?" is that reality (if indeed it is), and "What can/should we
> do about it?"

No disagreement there although the IETF has not been well-suited in
the past to function as a promoter/ marketer of its own protocols and
perspective.  Maybe that should change, but trying to change it
carries its own risks.

> (Or do we just want to throw in the towel say "the Internet was
> nice while it lasted", and we might as well let it atrophy? Because
> I see far too much of that attitude in IETF these days, and it's
> appalling.)

Again, I agree but, at the same time, it is not clear what can be
done. If you suggest that we should be careful about not becoming
part of the problem rather than part of a solution, I'd agree even
while not, in many cases, thinking we are well-equipped to get out of
whatever holes we and others have dug ourselves into.

    john





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