----- Original Message ----- I haven't tested with ovirt-engine-3.4, but there should be manually intervention due to missing features: 1. 'None' boot protocol via cloud init: eth1 of the appliance vm should be configured via cloud-init with static ip since the 'none' boot protocol for it wasn't supported on 3.4, and later on to edit the /etc/sysconfig/network-scripts/ifcfg-eth1 and remove the IPADDR and NETMASK entries from it. 2. update /etc/sysconfig/network-scripts/ifcfg-eth* to have ONBOOT=yes (fixed in 3.5) 3. RabbitMQ support added in 3.5: after the host is installed with the external provider, edit on the host /etc/neutron/neutron.conf and configure it to work with RabbitMQ by adding the following properties under section [DEFAULT] : rabbit_host = THE_APPLIANCE_CONFIGURED_IP rabbit_port = 5672 rabbit_userid = guest rabbit_password = guest rpc_backend = neutron.openstack.common.rpc.impl_kombu However, haven't tested it to verify those are the only steps needed.