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At the annual Internet2 Spring member meeting yesterday, an international team led by the University of Tokyo announced that it has set two consecutive new Internet2 Land Speed Records (I2-LSR) in the IPv6 single- and multi-stream categories.

For the first set of IPv6 records, a team from the University of Tokyo, WIDE Project, NTT Communications, JGN2, SURFnet, CANARIE, Pacific Northwest Gigapop and other institutions collaborated to create a network path over 30,000 kilometers in distance, crossing 6 international. The team successfully transferred data in the single- and multi-stream categories at a rate of 7.67 Gbps which is equal to 230,100 terabit-meters per second (Tb-m/s). This record setting attempt leveraged standard TCP to achieve the new mark.

The next day, the team used a modified version of TCP to achieve an even greater record. Using the same 30,000 km path, the network was able to achieve a throughput of 9.08 Gbps, which is equal to 272,400 Tb-m/s for both the IPv6 multi- and single-stream categories. In doing so, the team surpassed the current IPv4 records, proving that IPv6 networks are able to provide the same, if not better, performance as IPv4.

Dr. Kei Hiraki, professor at the University of Tokyo and LSR team leader said, "These records are final for the 10Gbps network era because they represent more than 98% of the upper limit of network capacity. Through collaboration by a number of institutions, we have demonstrated the ability to overcome the distance and achieve this newest mark."

For more information, go to data-reservoir.adm.s.u-tokyo.ac.jp/lsr-200612-01/ and data-reservoir.adm.s.u-tokyo.ac.jp/lsr-200612-02/

Internet2 is a not-for-profit advanced networking consortium comprising more than 200 U.S. universities in cooperation with 70 leading corporations, 45 government agencies, laboratories, and other institutions of higher learning as well as over 50 international partner organizations.

Led by the research and education community since 1996, Internet2 promotes the missions of its members by providing both leading-edge network capabilities and unique partnership opportunities that together facilitate the development, deployment, and use of revolutionary Internet technologies.

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