[ih] When did "32" bits for IP register as "not enough"?

[Scott O. Bradner]

> On Feb 13, 2019, at 2:08 PM, Dave Taht <dave at taht.net> wrote:
> 
> 
> The 0.0.0.0 thread has been fascinating and I now have more to read
> than I ever imagined I would. Moving sideways...
> 
> So, it seems obvious that address size problems plagued the arpanet
> and earlier versions of IP. When did the writing show up on the wall
> that the classful design wasn't working, and secondly that 32 bits
> wasn't enough?

from the proceedings of IETF 18 (https://www.ietf.org/proceedings/18.pdf)

"Sue Hares and Dale Johnson (MERIT)showed the growth of "configured" networks numbers in the NSFnet routing database. This indicates which networks have per- mission to send traffic across the NSFnet. Sue and Dale were instrumental in helping to define and explain these various "network number concepts", and how MERIT used these concepts in establishing its routing database.

Using this information, and information from BBN,Frank Solensky (Racal-Interlan), presented a statistical analysis on the rate of utilization of IP address space. He showedthat the growthis exponential. See the accompanyingslides for his projections whenthe IP address space becomedepleted (assuming continued exponential growth)."

Frank’s slides start on page 59 of the proceedings

Scott