Description of problem: network is non functional in f21 tc4 workstation live image solution appears to be running the following commands in term: ifconfig virbr0 down brctl delbr virbr0 this has to be run after every boot and is very annoying.
*** This bug has been marked as a duplicate of bug 811967 ***
...except that Bug 811967 was at some point moved to be Virtualization Tools/libvirt (i.e. upstream libvirt tracker) rather than Fedora/libvirt. BTW, Cole pointed it out in 811967, but just in case someone doesn't go there, once you've got Fedora installed in the VM, you can make removal of the libvirt default network (and thus the virbr0 bridge that is conflicting with the guest's network connection to the host) with this: sudo virsh net-destroy default sudo virsh net-autostart --disable default Alternately, edit the network definition in the guest to change the subnet: sudo virsh net-edit default [make the change] sudo virsh net-destroy default sudo virsh net-start default