e competition is increasing exponentially to provide the same services at lower cost. Network management standards like NETCONF & YANG are becoming very popular and abstracting the complete network management efficiently. Cisco NSO is multi-vendor service orchestrator for future network Infrastructure as well. It includes configuration management, validation, transaction Integrity & rollback. This is also the centralized pane of glass for L2-L7 networking, physical & virtual devices. Orchestration by Cisco NSO is YANG driven model for device data model as well as service data model. Business Challenges and the Need of Network Orchestration Higher operational expenses. Slow delivery of new services. Operational complexity. Integration of virtual & physical is challenging. Dynamic & Flexible management. Automation. Troubleshooting and testing end to end Network administrators and Server provider operators are managing both the operational cost which is growing day by day and the revenue. because revenue from new services doesn't give faster growth most of the time but operational cost increases exponentially with each new service installed and arranging the compatible and upgraded adaptors to support that newly installed service or application. Adapters are expensive most of the time and hard to maintain. NFV is changing the way we used to operate our network and to address these challenges. The industry is moving towards service oriented way of network management. SDN is coming up with different ways to centralized manage the entire network, enabling unified set of Application programming interfaces and the services which can be controlled and operated in real time. Configuration of the devices is one of the major costs driven factor in enterprise and provider network environment. There is still a lot of manual configuration to meet the day to day frequent changes in the network and preventing human error in the frequent changes is still a challenge. Frequent change of the physical equipment, replacement of the de