Possible dumb question: Does the machine you're running the server on have a static ip address? It should.
There is an interface eth0 which has a dynamic address.
The interfaces that dhcpd should listen are tun0, tun1 and so forth created bye qemu. These interfaces have each a static distinct address. The address depends on the number of the interface.
Asus K55VD, i5 3230M - Productivity/Programming (F24)
Asus M32CD - i7-6700, Asus STRIX-GTX970-DC2OC-4GD, 1x8 GB Sk Hynix 2133 MHz DDR4 - Gaming (W10)
Asus M5A99FX Pro R2.0 - AMD FX 8350, Asus GeForce GTX760-DC2OC-2GD5, 2x4 Kingston HyperX Fury Blue 1600 MHz DDR3 - Idle
HP Proliant DL 360 G5 - Heavy lifting (CentOS 7.2)
Yes. It was the 'SELinux protection for dhcpd daemon'. After disabling it the dhcpd server can start as expected.
This feature can also be accessed in Gnome under Desktop -> System Settings -> Security Level -> SELinux -> Modify SELinux Policy -> SELinux Service Protection.