Comment # 10 on bug 1095383 from Michal Filka

> After an ifdown eth0 && ifup eth0, the DHCP request suddenly worked, but for
> a short time only. I ran the netinstaller, which upgraded Leap 42.3 to Leap
> 15.0, but after the first automatic reboot the DHCP configuration failed
> again.
> As I urgently needed my machine for other work, I followed a advise found
> somewhere in a forum (the subject was about wicked/DHCP leases/UUID): I
> switched to NetworkManager via YaST (eth0 immediately came up with the
> correct DHCP configuration) and then back to wicked. Since then, wicked
> works as expected, even after several reboots.
> I'm sorry that I wasn't able to post more details, the problem is solved and
> the bug can be closed.

it sounds like another case when parts of NetworkManager and wicked where
running at once at installed target.

@Thomas:
I assume that you have been using wicked as a network service before upgrade.
Is that so? Thanks