Re: Hard questions (was: Diffserv PIB approved as Informational RFC)

Dan,

You do have to consider whether these "hard questions" are best
answered by an IETF working group. It seems that the next steps
require deployment experience not more standards. There is
a working group, NSIS, that is looking at developing some
signaling that may or may not be useful for diffserv-based
services that require signaling.

As for PDBs, Brian and I passed the bulk handling PDB on for its
next revision to be done by Roland Bless and Klaus Wehrle. They
are renaming it to Lower Effort PDB and did send us a revision
last week. As the WG is closing this can be submitted as
an individual draft, thought discussion should probably take
place on this list. For VW or a jitter delay bounded PDB, my
original co-authors and I have done quite a bit of work to
define such a PDB and have also worked with someone else
on provisioning approaches. We don't currently see a reason to
take this intellectual property to the IETF. If there's truly
commercial interest, we shall see.

Although it has been 3.5 years since RFCs 2474&5 were published,
it doesn't seem like there's been enough public interoperability
work or public commerical deployment to warrant a rewrite. Do
you think there has been and that we are ignoring it?

Diffserv queuing is available in a wide range of routers, but services
seem to have been slow to deploy. I would think this is at least
in part a result of changes in the economy. A crucial component
that seems not to have gotten the required attention is classification
or filtering, and that might slow deployment also.

You correctly note that there are difficult problems that remain in
diffserv, but it's not clear that they can be solved in an IETF WG.
So, I would say that we are taking a breather before finishing the
job and further that the breather is required so we can get some
experience.

	Kathie


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