On the subject of iperf, I just received this today: Iperf 2.0.4 addresses one major and several minor issues with Iperf. The bugs fixed were: * Iperf should no longer consume gratuitous CPU under Linux The help messages * have been expanded to include previously undocumented options The header * the stats report was missing a header which has been replaced. New in Iperf 2.0.4: * Under Linux you can select the TCP congestion algorithm by using the -Z (--linux-congestion) flag * Iperf has a minimal man page! Thanks to Stephen Hemminger and Claus Klein for their patches. This is intended to be the last release in the 2.0 train. Development efforts going forward will concentrate on the 2.1 series of releases. If significant bugs are found there will be a 2.0.5 release, but hopefully we won't need to do that. You can download it at: https://sourceforge.net/project/showfiles.php?group_id=128336 -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751