Since an administration server controls and administers all the functions of a virtual infrastructure, a failure of this administration system will make it impossible to perform any configuration changes to the virtual infrastructure. During this period, the administrators cannot react to problems such as resource bottlenecks or the failure of individual virtualisation servers, nor can they integrate a new virtualisation server into the infrastructure and/or create new virtual IT systems. Live migration (and by extension, the dynamic assignment of resources for individual guest systems) is also not possible without an administration server.