The impact and implications of the growth in residential user-to-user traffic
Proceedings of the 2006 conference on Applications, technologies, architectures, and protocols for computer communications
Diagnosing network disruptions with network-wide analysis
Proceedings of the 2007 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
Design of versatile academic infrastructure for multilayer network services
IEEE Journal on Selected Areas in Communications - Special issue on network infrastructure configuration
Twitter in disaster mode: smart probing for opportunistic peers
Proceedings of the third ACM international workshop on Mobile Opportunistic Networks
Characterizing inter-domain rerouting after japan earthquake
IFIP'12 Proceedings of the 11th international IFIP TC 6 conference on Networking - Volume Part II
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The Internet is one of the important infrastructures in our daily life, and its highly distributed and autonomous natures have been said to be robust against failures. This paper reports an impact of an unexpectedly large earthquake (M9.0) hit to the northern part of Japan at 14:46:18 on 11th March (UTC+9), 2011(the East Japan Earthquake) [2] on a nation-wide research and education network (SINET4 [10, 12, 13]) in Japan. We show that the network managed to run even after the earthquake thanks to two different levels of redundancies, though some physical links were damaged; consequently, the impact on the routing (both BGP and OSPF) was insignificant. At the epicenter area, some network nodes (i.e., universities) were disconnected from the network by the blackout upto 70 hours. In the view of long-term traffic trend, it took 5--6 weeks for recovery of the traffic volume there. On the other hand, in the backbone network, the rapid decrease (40--50%) in the traffic volume only lasted for a few hours due to the blackout near the epicenter, and the impact of the traffic decrease in the epicenter area on the backbone traffic is estimated to 15--25%. Furthermore, we confirmed the increases of the traffic generated by users who rushed to access to the network for obtaining up-to-date information and videostreams.