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Controllers (Infrastructure, Network and Application) participate in service instantiation and are the primary players in ongoing service management; for example, control loop actions, service migration and scaling, service configuration, and service management activities. Each controller instance supports some form of orchestration to manage operations within its scope.
Figure 1 show shows the two major domains that use orchestration: service orchestration, which is embodied in the MSO and service control, which is embodied in the controllers (Infrastructure, Application and Network Controllers). Although the objectives and scope of the domains vary, they both follow a consistent model for the definition and execution of orchestration activities.
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