To verify correct execution, and to get an idea of the amount of
overhead introduced by the protocol, we implemented and tested it on
two Pentium Pro 200 MHz under Free BSD 2.2 connected by 100 Mb/s Tulip
Fast Ethernet. We 
ported the available Linux U-Net to Free BSD, and implemented our
protocol inside the ADI-2 layer of the freely available MPICH version
of MPI.