What is OpenFlow protocol architecture in SDN?

ONF defines OpenFlow as the first standard communications interface defined between the control and forwarding layers of an SDN architecture. OpenFlow allows direct access to and manipulation of the forwarding plane of network devices such as switches and routers, both physical and virtual (hypervisor-based).

How do you define the relationship between SDN and OpenFlow?

OpenFlow is the standard southbound protocol used between the SDN controller and the switch. The SDN controller takes the information from the applications and converts them into flow entries, which are fed to the switch via OF. It can also be used for monitoring switch and port statistics in network management.

What is SDN network architecture?

Software-Defined Networking (SDN) is a network architecture approach that enables the network to be intelligently and centrally controlled, or ‘programmed,’ using software applications. SDN enables consistent management of the network, which may be made up of complex technology parts.

What is OpenFlow interface?

OpenFlow is an open interface for remotely controlling the forwarding tables in network switches, routers, and access points. As such OpenFlow for software defined networks provides open interface to networking nodes including routers, switches and the like. It enables visibility and openness in network.

What is the OpenFlow approach and what are the different components of an OpenFlow switch?

“An OpenFlow Logical Switch consists of one or more flow tables and a group table, which perform packet lookups and forwarding, and one or more OpenFlow channels to an external controller (Figure 1). The switch communicates with the controller and the controller manages the switch via the OpenFlow switch protocol.”

What is the role of OpenFlow?

OpenFlow is a programmable network protocol designed to manage and direct traffic among routers and switches from various vendors. It separates the programming of routers and switches from underlying hardware.