What is a highlight of the Service Chain component of the Agile Controller?

The highlight of the Service Chain component of the Agile Controller revolves around the capability of services being orchestrated through Layer 3 GRE (Generic Routing Encapsulation) tunnels. This means that the controller can dynamically set up and manage network services while utilizing GRE tunnels for encapsulation. GE tunnels allow for the separation of different types of internet protocols, providing a means for efficient data transmission through encapsulated packets. This mechanism is crucial for the agility and flexibility that the Agile Controller aims to achieve in service chaining, enabling seamless integration and configuration of network services without disrupting existing paths.

In this context, the other options present valid concepts but do not encapsulate the primary highlight of the service chaining mechanism. Visualizing service orchestration operations is indeed useful for analysis and management but does not directly define the core functionality. Adding service devices without altering the physical topology speaks to network flexibility but does not capture the essence of service orchestration. Automatic orchestration of services without manual intervention emphasizes automation benefits but lacks the specific technical context provided by the use of Layer 3 GRE tunnels. Therefore, the orchestration of services based on Layer 3 GRE tunnels is what distinctly outlines the Service Chain component's highlight within the Agile Controller framework.