Hi adamk,
In the interest of "teaching a man to fish", can someone explain what the problem was here and why this solved it?
Networking is done with "netctl service" and "services" are controlled by systemd on RuneAudio.
Rune tries to start the network as soon as possible, to get quick start-up.
If you do not have a wifi dongle installed Rune is paused until the service times out.
To disable the service you have to run this command once.
systemctl disable netctl-auto@wlan0.service
systemctl disable netctl-ifplugd@eth1.service
The same for the second ethernet port.
This command should be needless because it is not available and is not enabled on the Pi.
BTW: wlan0 should be disabled by default and only gets enabled when you plug in a wifi dongle.
Frank