Comment # 9 on bug 999546 from Michal Suchanek

I guess the problem is this:

2016-09-27T09:29:35.650626+00:00 wickedd-dhcp4[388]: Error: option 47 has zero
length
2016-09-27T09:29:35.650654+00:00 wickedd-dhcp4[388]: Error: unable to parse
DHCP4 response

Given that the installer does not use NetBIOS broken NetBIOS scope is
irrelevant and should not make it reject DHCP packets - if it's even broken
that it is empty.

Also I don't think the DHCP server specially crafts packets for the installer
so if everything else works with explicitly specified empty NetBIOS scope the
installer should also.