Northbound Interface

Definition

A northbound interface refers to the communication channel that connects the control layer of a network to the applications and services layer. It enables external applications to interact with the network management and orchestration capabilities, allowing for dynamic network management, automation, and service orchestration. This interface is crucial for software-defined networking (SDN) as it allows for the integration of various network applications and enhances the programmability of the network.

5 Must Know Facts For Your Next Test

1. Northbound interfaces often use APIs, enabling applications to communicate with the SDN controller for tasks like provisioning and monitoring.
2. Common northbound protocols include RESTful APIs, which allow for simple and flexible interactions between applications and the control layer.
3. These interfaces play a vital role in enabling programmability in networks, facilitating features such as automation and self-healing.
4. A well-designed northbound interface can greatly enhance user experience by providing intuitive ways to manage and interact with network services.
5. Integration with third-party applications through northbound interfaces is essential for building custom solutions tailored to specific business needs.

Review Questions

• How does a northbound interface contribute to the flexibility of network management in a software-defined networking environment?
  • A northbound interface contributes to network management flexibility by allowing external applications to communicate with the SDN controller. This communication enables dynamic configurations, monitoring, and orchestration of network resources. By integrating various applications through this interface, organizations can automate processes, respond quickly to changes in traffic demands, and streamline their operations in real-time.
• What are some common protocols used in northbound interfaces, and how do they enhance application integration?
  • Common protocols used in northbound interfaces include RESTful APIs and gRPC. RESTful APIs are widely favored due to their simplicity and ease of use, allowing developers to interact with the SDN controller via standard HTTP requests. These protocols enhance application integration by providing structured methods for data exchange, enabling third-party applications to leverage network services effectively while ensuring compatibility across different platforms.
• Evaluate the impact of northbound interfaces on the development of innovative networking solutions in modern enterprises.
  • Northbound interfaces have significantly impacted the development of innovative networking solutions by promoting greater programmability and automation. With these interfaces, enterprises can create custom applications that optimize resource allocation and improve service delivery. This capability not only leads to more efficient network management but also fosters creativity in developing solutions that address specific business challenges, thereby enhancing operational agility and competitive advantage in the market.

Related terms

Southbound Interface: The communication layer that connects the control plane to the data plane, allowing the controller to manage and configure network devices.

Application Programming Interface (API): A set of rules and protocols for building software applications that allows different systems to communicate and share data.

Network Function Virtualization (NFV): The process of virtualizing entire classes of network functions, allowing them to run in software on commodity hardware instead of dedicated appliances.