Clean install Fedora 29 reportedly does have working+default NAT networking
out of the box in virt-manager.
However, on my multiple upgraded (I think since Fedora 25) system, where it
was working with Fedora 28, no longer has networking on Fedora 29.
If someone can test :-D and see if they have the same problem, I think this
bug is possibly a valid blocker, but only if it is common and not something
specific to my system that I just can't figure out.
No virtual networks available
https://bugzilla.redhat.com/show_bug.cgi?id=1638984
Chris Murphy