Install F18 yum install -y virt-manager This picks up libvirt including libvirt-daemon-config-network-0.10.2-3.fc18.x86_64 run virt-manager and find there is no network available. virsh net-list --all is blank systemctl restart libvirtd.service the default NAT network will be available.
So it seems that the problem is that the libvirt-daemon package is installed and started before the %post script for libvirt-deamon-config-network is run. Perhaps that script should check for libvirtd already running and, if so, use virsh define instead of directly placing the file in /etc/libvirt?
Still relevant on F20
Patch was proposed on the upstream list: https://www.redhat.com/archives/libvir-list/2015-April/msg00785.html
*** Bug 1224398 has been marked as a duplicate of this bug. ***
Round #2: http://www.redhat.com/archives/libvir-list/2016-April/msg01680.html
libvirt-1.3.3.1-1.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2016-f5b59b4ca5
libvirt-1.3.3.1-1.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-f5b59b4ca5
libvirt-1.3.3.1-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.