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News and comments on community broadband networks, the communities deploying them and the technologies that support them. Published by Denise Frey and Al Bonnyman.

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Tuesday, August 19, 2003


Blackout 2003: Visualizing the Internet as it adapted to the blackout

From Slashdot:
"An anonymous reader writes 'Renesys put together a special report on the effects of the recent blackout on routing and network reachability on the Internet. It includes a cool animation of networks dropping off the internet (presumably as a result of the power outage)."

From Renesys' website:
"Widespread power outages in the northeastern U.S. starting on August 14 resulted in corresponding loss of reachability to several portions of the Internet. Backbone networks remained intact using emergency backup power supplies, but many regional networks went offline. The event is can be clearly observed in global routing table size changes, and an evolving geographical timeline of network outages highlights the coverage of the blackout. The route withdrawal timeseries themselves also reveal the effects that the event had on global routing."


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