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Don't forget tomorrow's seminar at 16:00 in GS/302 by Professor
Steve Uhlig from Queen Mary. It's a great chance to see this work
before it's presented at SIGCOMM.<br>
<br>
<div>Title: Anatomy of a Large European IXP</div>
<div><br>
</div>
<div>Abstract:</div>
<div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3"> The
largest IXPs carry on a daily basis traffic volumes in the</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">petabyte
range, similar to what some of the largest global</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">ISPs
reportedly handle. This little-known fact is due to a</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">few
hundreds of member ASes exchanging traffic with one</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">another
over the IXP’s infrastructure. This paper reports on</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">a
first-of-its-kind and in-depth analysis of one of the largest</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">IXPs
worldwide based on nine month worth of sFlow records</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">collected
at that IXP in 2011.</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">A main
finding of our study is that the number of actual</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">peering
links at this single IXP exceeds the total number of</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">AS links of
the peer-peer type in the entire Internet known</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">as of 2010!
To explain such a surprisingly rich peering fabric,</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">we examine
in detail this IXP’s ecosystem and highlight</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">the
diversity of networks that are members at this IXP and</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">connect
there with other member ASes for reasons that are</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">similarly
diverse, but can be partially inferred from their business</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">types and
observed traffic patterns. In the process, we</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">investigate
this IXP’s traffic matrix and illustrate what its</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">temporal
and structural properties can tell us about the member</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">ASes that
generated the traffic in the first place. While</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">our results
suggest that these large IXPs can be viewed as a</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">microcosm
of the Internet ecosystem itself, they also argue</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">for a
re-assessment of the mental picture that our community</font></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom:
0px; margin-left: 0px; font: normal normal normal 10px/normal
Helvetica; "><font class="Apple-style-span" size="3">has about
this ecosystem.</font></div>
</div>
<div><br>
</div>
<br>
<pre class="moz-signature" cols="72">--
Richard G. Clegg,
Dept of Elec. Eng.,
University College London
<a class="moz-txt-link-freetext" href="http://www.richardclegg.org/">http://www.richardclegg.org/</a>
</pre>
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