Re: Risk of Internet collapse grows

[Ratul Mahajan <ratul () cs washington edu>]

On Fri, 29 Nov 2002, Stephen Sprunk wrote:

> How much of this research is based on marketing maps on the ISPs' web sites,
> versus actual maps of the networks in question?  Most "tier 1" ISPs won't
> even let their vendors see the latter.

last year we *measured* isp maps as part of a research project called
rocketfuel and found that the marketing maps can differ significantly from
the real ones quite a bit because of lack-of-detail, outdated-ness, or
optimistic-projections. a paper describing the methodology and the maps
themselves can be found off:  
http://www.cs.washington.edu/research/networking/rocketfuel/

        -- ratul