2006.06.05 NANOG-NOTES BGP tools BOF notes

Wed Jun 7 15:31:22 UTC 2006

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).

Our tool is able to eat BGP dumps (in MRT format), Cisco/Juniper configs 
and NetFlow data. It's open-source and released under LGPL. It is still 
a command-line tool but we are working towards a more user-friendly 
interface.

Some useful links:
http://cbgp.info.ucl.ac.be
http://www.info.ucl.ac.be/~standel/bgp-converter/    -> Cisco/Juniper parser
http://cbgp.info.ucl.ac.be/gui-totem.html                    -> upcoming 
GUI
> A: Matt notes that if they can solve that question/write
> something that does all that, they'll have Arbor and
> others beating on their door.  ^_^
If any of you is interested in testing it on its data, please feel free 
to contact me :-)

Bruno

-- 
CSE Dept. UCL, Belgium - http://www.info.ucl.ac.be/~bqu
Phone: ++32 10 47 24 04          GSM: ++32 498 28 12 21