Before starting a virtual machine with libvirt, verify
that the libvirt "default" network has been started. This
network must be active for your virtual machine to be able
to connect out to the network. Starting this network will
create a Linux bridge (usually called
virbr0), iptables rules, and a
dnsmasq process that will serve as a DHCP server.
To verify that the libvirt "default" network is enabled, use the virsh net-list command and verify that the "default" network is active:
# virsh net-list Name State Autostart ----------------------------------------- default active yes
If the network is not active, start it by doing:
# virsh net-start default
