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Re: How to get a list of research and academic ISP ?
On Wed, Nov 15, 2006 at 06:46:06PM +0100, Maciej Kurant wrote: > Dear all, > > > > I am a PhD student at EPFL, Switzerland. My recent research interest is in > large scale differences between the commercial and academic parts of the > Internet. > > > > Of course, in order to perform this kind of studies I need a way to > distinguish between these two worlds. I've learnt that Abilene does not > provide commercial connectivity. This means that BGP prefixes and AS paths > announced by Abilene BGP routers should lead only to research and academic > destinations. that might be a flawed assumption. > I have extracted (from the BGP tables at > http://abilene.internet2.edu/observatory) a list of all such destinations > and obtained 1333 ASes (for data form July 2006). The number looks > reasonable, but I would like to be sure that I am not making a mistake. > Therefore I would be grateful if you could answer the following questions: > > > > 1) Is this approach to obtain a list of research and academic ISPs > correct? > 2) Do you maybe know of such lists compiled before? yes, check the NLANR/CAIDA data and the old MERIT/ISI datasets for NSFnet-era policy splits. > 3) If I keep not only the destination ASes, but also all ASes on the > AS paths towards these destination I obtain a list of about 1400 ASes. How > should I understand this? Does it mean that some research and academic > destinations are reachable from Abilene only by traversing the commercial > Internet? > > 4) Of course, research and academic ASes are often well connected to > the commercial Internet. My guess is that in most cases their peering > relationship is "customer-provider", where commercial ASes are providers. Is > it possible that an academic AS is a provider for some commercial ASes? If > so, does it happen often? some universities have "startup" entites that are spun up under the perview of the university. imho, its not common, but does happen. > > > Thank you in advance for your comments. > > Maciej Kurant > > > > > > > > ============================================= > > > > EPFL IC ISC LCA3 > > Maciej Kurant > > PhD Student > > CH-1015 Lausanne, Switzerland > > > > web site: <http://lcawww.epfl.ch/kurant> http://lcawww.epfl.ch/kurant > > > > ============================================= > > >