[afnog] Geo. Traffic modelling

Randy Bush randy at psg.com
Mon Nov 23 22:51:56 UTC 2009


you have sent a message to me which seems to contain a legal
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whether it may be archived, etc.

i do not accept such email.  my mail user agent detected a legal
notice when i was opening your mail, and automatically deleted it.
so do not expect further response.

yes, i know your mail environment automatically added the legal
notice.  well, my mail environment automatically detected it,
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and if you choose to work for some enterprise clueless enough to
think that they can force this silliness on the world, use gmail,
hotmail, ...

randy


John Gitau wrote:
> 
> 
> Thanks Mark,
> 
> I have settled for netflow(obviously) since we already have this
> running, taken the top 20 sites/destination IP addresses and used
> LIR/RIR data to give a rough idea of the location. RIPE's RIS and
> http://www.robtex.com/ also have a nice tool to show how well a certain
> AS is connected (wish I could get that installed here). 
> 
> Im hapilly surprised to find that there are quite a number of tools out
> there to analyze dns and bgp routing tables). This (my original query)
> is a one off requirement for now but I know how much data we generate
> here and how much information it can give so a few customized reporting
> tools will be written inhouse if we can't find one already done and is
> free (dns,bgp,netflow,nbar,log file sort of analysis tools).....
> 
> A commercial software is out of the question for now....lets see how far
> we can go before sliding that in as an option...
> 
> Regards
> Gitau
> 
> -----Original Message-----
> From: Mark Tinka [mailto:mtinka at globaltransit.net] 
> Sent: Monday, November 23, 2009 4:56 PM
> To: John Gitau
> Cc: afnog at afnog.org
> Subject: Re: [afnog] Geo. Traffic modelling
> 
> On Monday 23 November 2009 08:56:55 pm John Gitau wrote:
> 
> > I can for instance tell that most of my traffic is to  facebook, 
> > google, yahoo,cnn etc but I can't tell by the  AS where the server 
> > that serves the request is, If I  knew this then I can ask my upstream
> 
> > providers to ensure  we have more capacity to some of those  
> > destinations.......
> 
> NetFlow will surely tell you where you traffic is headed to/coming from,
> and which ASN's you're talking to the most/least.
> 
> However, note that enabling NetFlow on routers is half the battle.
> Analyzing that data and generating meaningful output is the other. Free
> tools work reasonably well, but for the best detail, commercial
> solutions tend to be attractive when it comes to NetFlow.
> 
> Start off with the free tools, particularly Nfsen/Nfdump. 
> 
> Cheers,
> 
> Mark.
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