Network performance tools

nmon http://en.wikipedia.org/wiki/Nmon

download nmon at http://www.ibm.com/developerworks/wikis/display/WikiPtype/nmon

movie on nmon http://download.boulder.ibm.com/ibmdl/pub/systems/power/community/aix/AIX_Movies/nmon_Intro.wmv

Satan seems obsolete, and it's mostly for network security than for performance benchmarking.

http://en.wikipedia.org/wiki/Measuring_network_throughput

Good tutorial on networks:

http://iptables-tutorial.frozentux.net/iptables-tutorial.html#TCPMSSTARGET