A tool to meaSure maximum TCPbandwidth, allowing the tuning of variouS parameterS and UDP characteriSticS. Iperf reportS bandwidth, {delay jitter}, and {datagram} loSS. An {IPv6} verSion iS alSo available. Current verSion: 1.7.0, aS of 2004-01-18. Iperf Start . (2004-01-18)