Kickstart installation of Red Hat Enterprise Linux 7 is failing because of missing network configuration

Issue

• I want to kickstart one system with RHEL 7.1 from our Red Hat satellite system. So I created a boot iso but the system doesn't install.
  • The below messages are shown on the console when the installation is failing.

Sep 12 15:50:50 localhost dracut-initqueue[600]: RTNETLINK answers: File exists
Sep 12 15:50:51 localhost dracut-initqueue[600]: Warning: Could not boot.
Sep 12 15:50:52 localhost dracut-initqueue[600]: Warning: /dev/root does not exist
Sep 12 15:50:52 localhost systemd[1]: Starting Dracut Emergency Shell...