When the big dig was going on in Boston, an entire interchange had to be constructed was used for some years and then torn down again. The cost of the interchange was in the high tens of millions of dollars.
On Tue, Oct 12, 2010 at 3:13 PM, Dave CROCKER <d...@dcrocker.net> wrote: > Perhaps beating a horse that has long left the gate, since I'm responding > to a > note earlier than the one I already responded to... But this issue really > needs > to be settled carefully, IMO, and the modern renditions about this period > of time are typically off the mark: > > > On 10/8/2010 6:47 AM, Steve Crocker wrote: > >> There simply wasn't a technically feasible plan on the table for >> co-existence >> and intercommunication of IPv4 and IPv6 networks. >> >> In addition to working our way through the IPv6 adoption and co-existence >> process, I think it would be useful to do a little soul-searching and ask >> ourselves if we're so smart, how come we couldn't design a next generation >> IP >> protocol and work out a technically viable adoption and co-existence >> strategy. >> > > > Bob Hinden and I chaired a working group that was answering your question > BEFORE > IPv6 was adopted and while there were a number of very different proposals. > > The community chose to drop the work and ignore the issue for 10 or 15 > years. It happens that Deering's proposal came out of participation in our > working group, muttering something like "all this transition stuff is fine, > but when it's done, what we'll be left with will be ugly." So he designed > his elegant IP enhancement. > > One bit of work that came out of the group was IPAE. More generally, it's > interesting to review documents of the competing proposals and note quite a > few > references to transition: > > <http://www.sobco.com/ipng/internet-drafts/index.html> > > My point, here, is that the failures here were ones of goals, priorities > and > management, not technology. Quite simply, we did not pay attention to > larger > issues such as market incentives and adoption barriers. > > > d/ > -- > > Dave Crocker > Brandenburg InternetWorking > bbiw.net > _______________________________________________ > Ietf mailing list > Ietf@ietf.org > https://www.ietf.org/mailman/listinfo/ietf > -- Website: http://hallambaker.com/
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