scope:

The present document reports on impacts of NFV-MANO failures and overload conditions, including human errors, on the availability and reliability of NFV-MANO. A set of use cases will be described and analysed which include interactions between NFV-MANO functional entities under such conditions and other functional blocks (VNF, EM, OSS, ...). Also situations are analysed, where availability is achieved by a system of collaborating NFV-MANO functional entities possibly provided by different vendors. As a result, recommendations for the requirements of an available and reliable NFV-MANO system will be derived.