nanog mailing list archives

Re: 2006.06.05 NANOG-NOTES BGP tools BOF notes


From: "Christopher L. Morrow" <christopher.morrow () verizonbusiness com>
Date: Sat, 10 Jun 2006 06:10:15 +0000 (GMT)


On Wed, 7 Jun 2006, Bruno Quoitin wrote:


Matthew Petach wrote:
Q: Randy Bush.  Common problem we all face.  I'm at 42
peering points; my neighbors are X.  I have route views
dumps, I have my BGP dumps.  I have my netflow data.
Want a whatifatron that shows what happens to my
traffic if depeer someone, or add someone, or
peer with SingTel in singapore, or stop peering
with Joe in SF.
That's a question many operators ask every day.

We have such a whatifatron. We used it for instance to investigate the
impact of peering/depeering on routing and on traffic in various ISP
networks including a large european transit network. Our tool is called
C-BGP and some of the what-if scenarios we performed on the GEANT
network were described recently in an IEEE Network paper entitled
"Modeling the routing of an Autonomous System with C-BGP" (November 2005).


Additionally, Richard Steenbergen has this:

http://www.nanog.org/mtg-0510/steenbergen.html

to say about this subject, the talk seemed cool, the tool is on
sourceForge I believe...


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