iperf3 delay, loss and jitter

[desta161921]

Is possible to add delay, loss and jitter in addition to measuring bandwidth using iperf3 for TCP and UDP packets?

[bmah888]

Not all of these measurements are visible to iperf3 depending on what protocol is used. For example for TCP, user-land applications don't (typically) get to know anything about packet loss because TCP guarantees lossless, in-order delivery.

For UDP, iperf3 exposes packet loss and jitter.

Because these are one-way transfers, computing delay (particularly with unsynchronized clocks) is difficult. Two-way round-trip delays can be computed using the ping(8) program. For a program that measures one-way delays, try owamp(8).