Comment # 4 on bug 1047317 from Frank Kruger

(In reply to Simon Herrmann from comment #1)
> tumbleweed version 20170703 (and I cannot get any updates without
> connectivity)

Try the changes regarding /etc/dhclient.conf and described here:

https://forums.opensuse.org/showthread.php/525732-No-DNS-resolving-after-update?p=2828500#post2828500

Works for me.