On Sep 1, 2009, at 2:22 AM, Pontus Pihlgren wrote: HIPPI (HIgh Performance Parallel Interface) is a high-speed interconnect found on many supercomputers. It is most often used for storage, but can also be used for point-to-point networking. In the latter application, TCP/IP is usually used, often with insanely high MTU values for very impressive transfer rates. The first iteration of the standard runs at 800Mbps, but current HIPPI (called "GSN", for Gigabyte System Network) run at 6.4Gbps. These are full-duplex speeds, 6.4Gbps in each direction. -Dave -- Dave McGuire Port Charlotte, FL