[93414] in North American Network Operators' Group
How to get a list of research and academic ISP ?
daemon@ATHENA.MIT.EDU (Maciej Kurant)
Wed Nov 15 12:46:44 2006
From: "Maciej Kurant" <maciej.kurant@epfl.ch>
To: <nanog@merit.edu>
Date: Wed, 15 Nov 2006 18:46:06 +0100
Errors-To: owner-nanog@merit.edu
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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. 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?
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?
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
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<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>Dear all,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>I am a PhD student at EPFL, <st1:place =
w:st=3D"on"><st1:country-region
w:st=3D"on">Switzerland</st1:country-region></st1:place>. My recent =
research
interest is in large scale differences between the commercial and =
academic
parts of the Internet. <o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>Of course, in order to perform this kind of =
studies I
need a way to distinguish between these two worlds. I’ve learnt =
that <st1:place
w:st=3D"on"><st1:City w:st=3D"on">Abilene</st1:City></st1:place> 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
following questions: <o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal =
style=3D'margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 =
lfo1'><![if !supportLists]><font
size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:10.0pt;font-family:Arial'><span
style=3D'mso-list:Ignore'>1)<font size=3D1 face=3D"Times New =
Roman"><span
style=3D'font:7.0pt "Times New =
Roman"'> =
</span></font></span></span></font><![endif]><font
size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:10.0pt;font-family:Arial'>Is
this approach to obtain a list of research and academic ISPs =
correct?<o:p></o:p></span></font></p>
<p class=3DMsoNormal =
style=3D'margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 =
lfo1'><![if !supportLists]><font
size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:10.0pt;font-family:Arial'><span
style=3D'mso-list:Ignore'>2)<font size=3D1 face=3D"Times New =
Roman"><span
style=3D'font:7.0pt "Times New =
Roman"'> =
</span></font></span></span></font><![endif]><font
size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:10.0pt;font-family:Arial'>Do
you maybe know of such lists compiled before? =
<o:p></o:p></span></font></p>
<p class=3DMsoNormal =
style=3D'margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 =
lfo1'><![if !supportLists]><font
size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:10.0pt;font-family:Arial'><span
style=3D'mso-list:Ignore'>3)<font size=3D1 face=3D"Times New =
Roman"><span
style=3D'font:7.0pt "Times New =
Roman"'> =
</span></font></span></span></font><![endif]><font
size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:10.0pt;font-family:Arial'>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 <st1:place w:st=3D"on"><st1:City =
w:st=3D"on">Abilene</st1:City></st1:place>
only by traversing the commercial Internet?<o:p></o:p></span></font></p>
<p class=3DMsoNormal =
style=3D'margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 =
lfo1'><![if !supportLists]><font
size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:10.0pt;font-family:Arial'><span
style=3D'mso-list:Ignore'>4)<font size=3D1 face=3D"Times New =
Roman"><span
style=3D'font:7.0pt "Times New =
Roman"'> =
</span></font></span></span></font><![endif]><font
size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:10.0pt;font-family:Arial'>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?<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>Thank you in advance for your =
comments.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>Maciej Kurant<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3D"Courier New"><span lang=3DPL
style=3D'font-size:10.0pt;font-family:"Courier =
New"'>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<o:p></=
o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3D"Courier New"><span lang=3DPL
style=3D'font-size:10.0pt;font-family:"Courier =
New"'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3D"Courier New"><span lang=3DPL
style=3D'font-size:10.0pt;font-family:"Courier New"'>EPFL IC ISC =
LCA3<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3D"Courier New"><span lang=3DPL
style=3D'font-size:10.0pt;font-family:"Courier New"'>Maciej =
Kurant<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3D"Courier New"><span =
lang=3DDE-CH
style=3D'font-size:10.0pt;font-family:"Courier New"'>PhD =
Student<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3D"Courier New"><span =
lang=3DDE-CH
style=3D'font-size:10.0pt;font-family:"Courier New"'>CH-1015 Lausanne,
Switzerland<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3D"Courier New"><span =
lang=3DDE-CH
style=3D'font-size:10.0pt;font-family:"Courier =
New"'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3D"Courier New"><span =
lang=3DDE-CH
style=3D'font-size:10.0pt;font-family:"Courier New"'>web site: =
</span></font><font
size=3D2 face=3D"Courier New"><span lang=3DFR-CH =
style=3D'font-size:10.0pt;font-family:
"Courier New"'><a href=3D"http://lcawww.epfl.ch/kurant"><span =
lang=3DDE-CH>http://lcawww.epfl.ch/kurant</span></a></span></font><span
lang=3DDE-CH><o:p></o:p></span></p>
<p class=3DMsoNormal><font size=3D2 face=3D"Courier New"><span =
lang=3DDE-CH
style=3D'font-size:10.0pt;font-family:"Courier =
New"'><o:p> </o:p></span></font></p>
<p class=3DMsoAutoSig><font size=3D2 face=3D"Courier New"><span =
lang=3DFR-CH
style=3D'font-size:10.0pt;font-family:"Courier =
New"'>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</span>=
</font><span
lang=3DFR-CH><o:p></o:p></span></p>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p> </o:p></span></font></p>
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