[93417] in North American Network Operators' Group
Re: How to get a list of research and academic ISP ?
daemon@ATHENA.MIT.EDU (Marshall Eubanks)
Wed Nov 15 16:18:13 2006
In-Reply-To: <001e01c708dd$ed8d3f00$7097b280@ic.intranet.epfl.ch>
Cc: <nanog@merit.edu>
From: Marshall Eubanks <tme@multicasttech.com>
Date: Wed, 15 Nov 2006 16:16:51 -0500
To: "Maciej Kurant" <maciej.kurant@epfl.ch>
Errors-To: owner-nanog@merit.edu
On Nov 15, 2006, at 12:46 PM, Maciej Kurant wrote:
> Dear all,
>
>
>
> I am a PhD student at EPFL, Switzerland. My recent research =20
> interest is in large scale differences between the commercial and =20
> academic parts of the Internet.
>
>
>
> Of course, in order to perform this kind of studies I need a way to =20=
> distinguish between these two worlds. I=92ve learnt that Abilene does =20=
> not provide commercial connectivity. This means that BGP prefixes =20
> and AS paths announced by Abilene BGP routers should lead only to =20
> research and academic destinations. I have extracted (from the BGP =20
> tables at http://abilene.internet2.edu/observatory) a list of all =20
> such destinations and obtained 1333 ASes (for data form July 2006). =20=
> The number looks reasonable, but I would like to be sure that I am =20
> not making a mistake. Therefore I would be grateful if you could =20
> answer the following questions:
>
>
>
> 1) Is this approach to obtain a list of research and academic =20=
> ISPs correct?
It's a way. The trouble is that
- most I2 As's also have "I1" connections and run BGP on that as well.
- Any corporate member of I2 has the right to announce their routes =20
into I2
What I would do is to take the list and look at the names (on a list =20
such as
http://www.multicasttech.com/status/asn_expand.txt
=46rom the name of the institution, you should be able to tell in most =20=
cases.
> 2) Do you maybe know of such lists compiled before?
>
> 3) If I keep not only the destination ASes, but also all ASes =20=
> on the AS paths towards these destination I obtain a list of about =20
> 1400 ASes. How should I understand this? Does it mean that some =20
> research and academic destinations are reachable from Abilene only =20
> by traversing the commercial Internet?
There are certainly some academic aggregation SP's - NYSERNET and =20
CANARIE and RENATER (google on those) come to mind.
> 4) Of course, research and academic ASes are often well =20
> connected to the commercial Internet. My guess is that in most =20
> cases their peering relationship is =93customer-provider=94, where =20
> commercial ASes are providers. Is it possible that an academic AS =20
> is a provider for some commercial ASes? If so, does it happen often?
It may happen, but probably not often.
>
>
> Thank you in advance for your comments.
>
> Maciej Kurant
>
>
Hope this helps.
Regards
Marshall Eubanks
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> EPFL IC ISC LCA3
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> Maciej Kurant
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> PhD Student
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> CH-1015 Lausanne, Switzerland
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> web site: http://lcawww.epfl.ch/kurant
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