Found this interesting. Mark.
---------- Forwarded Message ----------
Subject: Modelling a large ISP network with C-BGP
Date: Thursday 02 February 2006 18:02
From: Olivier Bonaventure <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED], [EMAIL PROTECTED],
[EMAIL PROTECTED], Sébastien Tandel
<[EMAIL PROTECTED]>
Cc: Bruno Quoitin <[EMAIL PROTECTED]>
Dear All,
C-BGP is an efficient and open-source simulation tool
that allows to simulate the behavior of the intra- and
interdomain routing protocols in large ISP networks.
C-BGP is able to simulate networks with thousands of
routers. A key feature ofco C-BGP compared to other
simulators is that it is able to support the complex
routing policies that are used by ISPs.
Thanks to the support of France Telecom R&D, we have been
able to use C-BGP to reproduce the behavior of BGP in a
large Tier-1 ISP network. For this analysis, we have
developped several tools to automatically convert the
BGP configurations of Juniper (JUNOS) and Cisco (IOS)
routers, the IGP topology and the BGP routes in the
C-BGP format. With these tools, any network operator can
easily build a C-BGP model of his/her network. With such
a model, it is possible to perform different types of
analysis on the ISP network, such as :
- predicting the flow of the traffic through the
network or determining the traffic matrix based on
Netflow data (see article in January issue of ACM
SIGCOMM Computer Communication Review) - predicting the
impact of adding a new peering link on the BGP routes
selected by the routers (see article in Nov/Dec issue of
IEEE Network Magazine)
- predicting the impact of link or router failures on
the ISP network
You can obtain C-BGP, the conversion tools and several
papers describing the utilization of C-BGP to model an
ISP network or compute traffic matrices from :
http://cbgp.info.ucl.ac.be
The website also contains several examples, such as a
complete C-BGP model of the Abilene Network based on
their publically available JUNOS configurations files.
We believe that C-BGP could be very useful for ISPs
willing to optimise the distribution and the selection
of the BGP routes in their network. Comments,
suggestions and questions from network operators are
more than welcome.
Best regards,
Bruno Quoitin, Sebastien Tandel and Olivier Bonaventure
--
CSE Dept. UCL, Belgium -
http://www.info.ucl.ac.be/people/OBO/
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