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The controller or the “control plane” is at the heart of software defined networks (SDN). As SDN migrates to wide area networks (WAN), scalability and performance are two important factors that differentiate one controller from another, and they are critical for success of SDN for end-to-end service management. We distinguish control flows from data flows, and introduce a novel dynamic control plane...
An algorithm on automatic topology discovery in OpenFlow supported software defined networks is proposed. The proposed algorithm utilizing link layer discovery protocol allows to obtain the whole network topology by the network controller. We have validated the successful operation of our algorithm through simulation and real network tests seperately, and shown that it scales linearly.
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