Archive for August, 2007

what we can’t measure on the Internet

Sunday, August 26th, 2007 by kc

As the era of the NSFnet Backbone Service came to a close in April 1995, the research community, and the U.S. public, lost the only set of publicly available statistics for a large national U.S. backbone. The transition to the commercial sector essentially eliminated the public availability of statistics and analyses that would allow scientific understanding of the Internet a macroscopic level.

In 2004 I compiled an (incomplete) list of what we generally can’t measure on the Internet, from a talk I gave on our NSF-funded project correlating heterogeneous measurement data to achieve system-level analysis of Internet traffic trends:


It is fair to say that we need a new routing system

Wednesday, August 8th, 2007 by kc

i get this question a lot:

at the current churn rate/ratio, at what size does the
FIB need to be before it will not converge? (also sometimes pronounced ‘when will the current Internet routing architecture break?’)

a good question, has been asked many times, and afaik no one has provided any empirically grounded answer.

a few realities hinder our ability to answer this question.