[Nets-seminars] Seminar tomorrow at 16:00

[Richard G. Clegg]

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.

Title: Anatomy of a Large European IXP

Abstract:
  The largest IXPs carry on a daily basis traffic volumes in the
petabyte range, similar to what some of the largest global
ISPs reportedly handle. This little-known fact is due to a
few hundreds of member ASes exchanging traffic with one
another over the IXP's infrastructure. This paper reports on
a first-of-its-kind and in-depth analysis of one of the largest
IXPs worldwide based on nine month worth of sFlow records
collected at that IXP in 2011.
A main finding of our study is that the number of actual
peering links at this single IXP exceeds the total number of
AS links of the peer-peer type in the entire Internet known
as of 2010! To explain such a surprisingly rich peering fabric,
we examine in detail this IXP's ecosystem and highlight
the diversity of networks that are members at this IXP and
connect there with other member ASes for reasons that are
similarly diverse, but can be partially inferred from their business
types and observed traffic patterns. In the process, we
investigate this IXP's traffic matrix and illustrate what its
temporal and structural properties can tell us about the member
ASes that generated the traffic in the first place. While
our results suggest that these large IXPs can be viewed as a
microcosm of the Internet ecosystem itself, they also argue
for a re-assessment of the mental picture that our community
has about this ecosystem.


-- 
Richard G. Clegg,
Dept of Elec. Eng.,
University College London
http://www.richardclegg.org/

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