[ih] Hourglass model question

[Bradley Fidler]

The hourglass shows up in May 1990 at IETF 17, in a presentation by Cyndi
Mills (page 220 of the proceedings). Her presentation was on metering so I
assume her use of the term was uncontroversial. RFC references appear to
come after.

One way to answer Andy's question 3 would be to look for the evolution of
the concept but not the term, which would encourage us to ask how strictly
it should be delineated from modularity, and if the Internet community's
intellectual history includes lineages with earlier spanning layer work;
Bärwolff's dissertation on the end to end argument provides some of this
groundwork, for example by pointing to Saltzer and others in the 70s.

Jack's comment raises for me the question of how IP was understood, or how
its future implementations were considered, over time; for example, the
significance of the creation and eventual disuse of certain IP options for
the hourglass model. Presumably the TCP/IP split was relevant as well.

Brad



On Wed, 3 Jul 2019 at 13:43, Jack Haverty <jack at 3kitty.org> wrote:

> On 7/3/19 6:54 AM, Andrew Russell wrote:
>
> > 2) when/where did the TCP/IP community borrow it from the OSI
> > community?  (I’m assuming this is how it happened, would be very
> > interested in evidence or recollections to the contrary)
> >
> My recollection from many meetings in the early 80s of the ICCB/IAB, TCP
> Working Group, Internet Working Group, et al is that the TCP/IP
> community did *not* borrow the OSI model at all.  Or at least not in the
> early days of the Internet through 1983 or so, I'm not sure what
> happened later.
>
> There were people who liked having a model, and the organizational
> aspects of all the layers - kind of like a Unified Theory of
> Networking.  They wrote lots of papers about it.  However, the
> discussions I recall were pretty much all about how the TCP/IP
> technology we were building, in the real world of computer code and
> packet headers, didn't fit at all into the layering of the paper
> world.   Still doesn't, AFAIK.
>
> /Jack Haverty
>
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> internet-history mailing list
>
>
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