Also known as: northbound interface, NBI
Quick Definition
APIs on an SDN controller that allow applications and management tools to communicate with the controller.
Northbound APIs expose the SDN controller's capabilities to upper-layer applications, orchestration tools, and business systems. They sit between the controller and the application layer. These APIs are typically REST-based (HTTP/JSON) and allow network operations teams to automate configuration, retrieve telemetry, and integrate with IT management platforms. Cisco DNA Center exposes northbound REST APIs.
Northbound = toward applications/management (above the controller). Southbound = toward network devices (below the controller). Think: north is up (toward the user/application), south is down (toward the network).
An API architectural style that uses HTTP methods (GET, POST, PUT, DELETE) to interact with network resources.
An architecture that separates the network control plane from the data plane, enabling centralised programmability.
APIs on an SDN controller that communicate with and programme the network devices below.
Cisco's SDN controller and network management platform providing centralised automation and analytics.
Northbound APIs expose the SDN controller's capabilities to upper-layer applications, orchestration tools, and business systems. They sit between the controller and the application layer. These APIs are typically REST-based (HTTP/JSON) and allow network operations teams to automate configuration, retrieve telemetry, and integrate with IT management platforms. Cisco DNA Center exposes northbound REST APIs.
Northbound = toward applications/management (above the controller). Southbound = toward network devices (below the controller). Think: north is up (toward the user/application), south is down (toward the network).
Northbound API falls under the Automation domain of the 200-301 exam. Understanding it in context with related terms like southbound-api and sdn is essential for answering scenario-based questions correctly.