Recommendation ITU-T M.3173.2 specifies the interface analysis for synergy management of cloud and software defined networking (SDN) based networks. This Recommendation provides the interface analysis model (information model) for the synergy management of cloud and SDN-based networks, and specifies the managed entities and their relationships for the synergy management interface at a technology-independent level (protocol-neutral). Recommendation ITU-T M.3173.2 also provides detailed attribute definitions of each managed entities, and the interactive control information exchanged through this synergy management interface.