iperf2: iperf2 (A tool to measure IP bandwidth using UDP or TCP) iperf2: iperf2: Iperf is a tool to measure IP bandwidth using UDP or TCP. It allows iperf2: for tuning various parameters, and reports bandwidth, delay jitter, iperf2: and packet loss. Itsupports IPv6 and multicast. iperf2: iperf2: iperf2: iperf2: iperf2: iperf2: