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I am new to this layer of networking so I apologize if this question is a bit strange.

When running a traceroute, I get the up addresses of the route it takes. Now, I take these addresses and map the ASN number.

My question (and again being very new), how can I determine the internet backbones. Basically I want to determine programmatically if a backbone is active and responding. Perhaps I am asking the wrong question I know

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  • Can you expand on how you "Now, I take these addresses and map the ASN number" ? Do you have your own AS? Is this to work out if your peer AS routes are up?
    – Kev
    Dec 12, 2011 at 1:15
  • Anything you can't get from internetpulse.com ?
    – voretaq7
    Dec 12, 2011 at 1:25
  • I have my IP addresses from my traceroute and I run it through a geoip service. I guess, in the end, I am trying to figure out the whole concept of ASNs. Basically, I want to map out and get a backbone from one of my sites to my location via the backbones. Is a lower ASN number indicative of a backbone?
    – KingFish
    Dec 12, 2011 at 4:59

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Use the Fixed Orbit search page, enter the ASN, and it will tell you what ASNs are directly connected to it. Unfortunately, that does not understand parent/child relationships, so you see all neighbors, from small multi-homed companies, to huge "backbone" ISPs. If there are few connections, like most places have, you can often eyeball it and say "Level-3, QWest, Cogent, and AboveNet are their uplinks, and MIT and UMass are their customers".

To get some more ideas of them in a hierarchical view, you can "telnet route-views.routeviews.org" and run "show ip bgp IP_ADDRESS" for an IP within their range, or "show ip regex AS" to see paths that have that AS in it.

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