[nsp] AS info in traceroutes

Ejay Hire ejay.hire at isdn.net
Thu Mar 6 15:24:57 EST 2003

here are a couple of ways you could get that data.
1. Recieve a full bgp table and match the most specific route and then look at the rightmost ASN in the AS path.
2. Same as a except using real time data from route-views.oregon-ix.net <mailto:route-views at oregon-ix.net> 
3. Same as above except using downloadable historcal data from route-views.oregon-ix.net <mailto:route-views at oregon-ix.net>  or merit.edu
Good Luck,
-----Original Message-----
From: John Jackson [mailto:jjackson at onenet.net]
Sent: Thursday, March 06, 2003 2:56 PM
To: 'Jim Devane'; cisco-nsp at puck.nether.net
Subject: RE: [nsp] AS info in traceroutes

Yes, I would think so.  I just did a traceroute from a router that wasn't bgp aware and the ASNs were not there, but they were there when I did a traceroute from a bgp aware router.
-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jim Devane
Sent: Thursday, March 06, 2003 2:38 PM
To: cisco-nsp at puck.nether.net
Subject: [nsp] AS info in traceroutes
I am looking into how a Cisco router is able to provide AS resolution in a traceroute. 
I am trying to write a traceroute program and would like to include that info in my own traces. Would I have to have a BGP table of my own on the server to get the info?
looking for suggestions, 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://puck.nether.net/pipermail/cisco-nsp/attachments/20030306/5324ab7b/attachment-0001.htm

More information about the cisco-nsp mailing list