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Last year, I had found a site that had an application (either Java or Flash, I can't remember) that displayed an interactive graph of the ASes in the backbone of the Internet. You could select any AS and see in graph form which were its peers, along with a lot of other information, including the announcements received in the last 2-3 days.

For every AS, you could get its whois information, and the prefixes that it was announcing. Everything was interactive.

It was a fantastic visualization and demonstration tool that I showed to my students (Computer Networks course), in order for them to have a glance at how the Internet looks like in its core, how BGP routing was working to keep our packets flowing, etc.

Unfortunately, I can't seem to find this link anymore, and I would like to show it again this year to my students. I would like to know any information about this site, or any other sites that provide good interactive and interesting visualizations about the inner workings of the Internet.

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up vote 1 down vote accepted

I always find BGPlay to be interesting and useful.

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This is a good suggestion, thanks! – Juliano Oct 1 '10 at 18:19

I finally found the tool that I originally was looking for:

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