[libvirt] Deleted all setting after reboot

Hello all great, We had a question, We use OpenStack IceHouse on CentOS 6.5. We use libvirt for create network, attach interface to our VMs and ... There is a problem. When our server restart (reboot), all settings are deleted. We have to go back and do all the setting (create network, attach an interface and ...) from the beginning. How can we solve our problem. our command we enterd: virsh list virsh domiflist ID virsh attach-interface --domain ID --type bridge --source br100 virsh managedsave ID