$ virsh start ece-install-tester
error: Failed to start domain 'ece-install-tester'
error: Requested operation is not valid: network 'default' is not active
# virsh net-autostart --network default
Network default marked as autostarted
# virsh net-start default
Network default started
# virsh net-list --all
Name State Autostart Persistent
--------------------------------------------
default active yes yes