Comment # 5 on bug 1095383 from Michal Filka

(In reply to Thomas Formella from comment #0)
> I'm trying to upgrade a working Leap 42.3 to Leap 15.0 with the
> "openSUSE-Leap-15.0-NET-x86_64267" ISO image. Network connection is via
> wired ethernet.
> Previous upgrades, for example from 42.2 > 42.3, worked flawlessly.
> 
> Boot parameter: ipv4only=1
> 
> All I can see is:
> 
> Loading basic drivers... ok
> ...
> Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
>   drivers: r8169*
> eth0: network config created
> Sending DHCP4 request to eth0...
> DHCP configuration failed.
> 
> Omitting the "ipv4only=1" boot parameter leads to the same result (the
> router is IPv4 only).

Could you pls switch to terminal and attach output of

journalctl -b -o short-iso | fgrep wicked

Thanks.