North American Network Operators Group

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Re: AS discovery tools / CAIDA

  • From: Deepak Jain
  • Date: Tue Jan 11 16:46:40 2000

Along these same lines, is there a tool to recursively determine how many 
prefixes are being announced behind each AS, even for AS not directly 
peered with and not directly terminating traffic? (numbers are only for 

For example:	AS 1 2 3 4 5 6	AS 10 2 3 4 11 12      AS 10 2 3 16 6      AS 15 6

Say AS 2 is a large regional European ISP that buys transit from AS 1 and
10 that may be in a region were we have a presence, but for some reason we
are not directly peering with them. I would like to figure out a way to
determine how much traffic we are passing through AS 2 in this example. 

The only way I could think of it was aggregating netflow prefix data,
which seems horrible to me and doesn't handle a prefix where I am trying
to generate data for several ASes. And we can't just aggregate the sum of
AS2's customers because some of their customers are not announcing all of
their prefixes from the same connections. 

Any suggestions? Thanks in advance.

Deepak Jain

On Tue, 11 Jan 2000, k claffy wrote:

> curtis
> if you mean the 
> thingie
> it's a hyperbolic viewer [email protected] built on code
> developed by Tamara Munzner (Stanford) 
> 	http://graphics.stanford.EDU/~munzner/h3/
> so far it works with mrtd routing table data,
> (and almost with the subconsistent 
> cisco output) and skitter topology output files,
> more in future as development cycles permit
> availability still limited
> k
> On Tue, Jan 11, 2000 at 09:35:54AM -0600, curtis l owings wrote:
>   A while back I saw a demo of an applet that would display AS number as
>   they connect to each other and a color indication of the number of route
>   flaps within each AS.  But, of course, my memory is too poor to remember
>   which NANOG conference it was or what the name of the tool was.
>   I'm specifically looking for a tool that will show an AS and what other
>   networks connect to it (I don't really care about route flaps).
>   I've done a quick scan of the NANOG site and CAIDA, but didn't find it.
>   ____________________________________________
>   Curtis Owings            phone: 913-534-2322
>   Sprint Broadband          cell: 913-706-6157
>   BSC Engineer            page: 1-800-724-3508
>   OP, KS          <[email protected]>
>   ____________________________________________
>    "Your enemy is not evil in his own mind."