An international team led by the University of Tokyo has set two consecutive new Internet2 Land Speed Records (I2-LSR) in the
IPv6 single and multi-stream categories. The team, which also included WIDE Project, NTT Communications, JGN2, SURFnet, CANARIE, Pacific Northwest Gigapop and other institutions, used a network path that spanned 30,000 km across 6 international networks. They trasmitted 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.
In a follow-up test, 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.
http://data-reservoir.adm.s.u-tokyo.ac.jp/lsr-200612-01/http://www.internet2.edu
