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. 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
this approach to obtain a list of research and academic ISPs correct?
you maybe know of such lists compiled before?
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
only by traversing the commercial Internet?
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?
Thank you in advance for your comments.
EPFL IC ISC LCA3
web site: http://lcawww.epfl.ch/kurant