It's worth mentioning that this proj.sunet.se/LSR2 test was done using the previous generation of Intel 10Gb PCI-X NICs, the new ones were announced last week: http://www.intel.com/network/connectivity/products/pro10GbE_SR_server_adapte... It uses the same controller ASIC, but is half the length and has XPAK optics. Interesting stuff regarding the 82597EX 10Gb NIC controller chip and Linux: http://www.google.com/search?q=82597EX+Linux&sourceid=mozilla-search&start=0&start=0&ie=utf-8&oe=utf-8 Peter Lothberg wrote:

TCP is mostly a implemenation/parameter setting problem for resonable speeds, for high_speed, you can not drop packets.

Have a look at proj.sunet.se/LSR2.

2 $1500 mail_order PC's, 40 router hops, almost around half of the earth.

-Peter