iperf is now installed by default starting with nightly build #1169.
Once iperf is installed on a node, network link health can be measured.
You can also install iperfspeed as a service on a node which will provide a GUI interface to test performance of AREDN links on the local network.

An earlier nightly build included the tunnel package, so once you upgrade to a nightly, you will not need
to disable the tunnel(s) before loading a future AREDN release.

3s, Chuck