SDN Southbound Protocols for CCIE Data Center Written Exam

SDN Southbound Protocols


Which three options are SDN Southbound protocols? (Choose three.)



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A. B. C. D. E. F.


Software-Defined Networking (SDN) is an approach to network design that separates the control plane and data plane. The SDN architecture is composed of three layers: the application layer, the control layer, and the infrastructure layer. The Southbound protocols are used between the control and infrastructure layers to communicate information about network topology, device capabilities, and network policies.

The correct options for the three SDN Southbound protocols are:

C. OpenFlow - OpenFlow is a standardized protocol used to control network switches and routers. It allows the control layer to communicate with the data plane and define how packets are forwarded through the network.

D. PCEP - Path Computation Element Communication Protocol (PCEP) is used to communicate between the SDN controller and network devices to compute the optimal path for network traffic.

F. OVSDB - Open vSwitch Database Management Protocol (OVSDB) is a protocol used to manage virtual switches in an SDN environment.

Option A, Puppet, is a configuration management tool used to automate the deployment and management of network devices. It is not a Southbound protocol.

Option B, API, is a general term for Application Programming Interfaces, which are used to communicate between software applications. While APIs can be used in SDN environments, they are not a specific Southbound protocol.

Option E, VXLAN, is a tunneling protocol used to overlay virtual networks on top of an existing physical network. It is not a Southbound protocol.