Ronald,
RvdP> There is a big difference between planning/engineering for a transition
RvdP> and planning/engineering for a coexistance. There seem to be forces
RvdP> trying to steer to the latter. Seems like an important question. Why
RvdP> would we want an internet with two protocols with the same functionality
RvdP> running in parallel? Should that be the goal?
It is not possible to have a flag-day event for switching to a
replacement service.
Hence, there must be a transition that takes some time.
Remember that this involves thousands of independent administrations and
many tens of millions of systems
Any detailed consideration of the mechanics and time-frame required of
such a transition -- and, yes, I said required; not desirable, not
likely, but required -- you will discover that those details look
exactly like "coexistence".
d/
--
Dave Crocker <mailto:dcrocker(_at_)brandenburg(_dot_)com>
Brandenburg InternetWorking <http://www.brandenburg.com>
Sunnyvale, CA USA <tel:+1.408.246.8253>, <fax:+1.866.358.5301>