[Users] ovirtmgmt vanishes after reboot

Hi. I have configured an ovirt-engine to manage an ovirt node succesfully. I have created VM and all runs well but im trying to do some escenario testing and i have found an issue. If somehow the ovirt node is rebooted(Power failure, crash, manual reboot, etc) when its comes up it does not start the ovirtmgmt network. Even if in the ovirt-engine you save network configuration or if you execute persist on /etc/sysconfig/network-scripts/ifcfg-ovirtmgmt. It tells you it's already been added to the configuration. Is this normal behavior after ovirt node's is rebooted? Am i doing something wrong? Best regards. Francisco.