So there is no persistence between boots without provisioning
and changing the properties using dbus/connmanctl is meant to be temporary?
Tried another system, that uses systemd instead of sysvinit.
There configuration works as expected.
I can set a static IP using dbus/connmanctl and it stays static after reboot.
Also the /var/lib/connman/ethernet_MAC_cable/settings file is updated immediately.
Do newer connman versions depend on systemd?
Thank you for your help.