We lived in an invariably dependent world of the internet. The internet has definitely started off from a humble communication line of sending sensitive files during the military DARPA to the present time of it controlling every aspect of monitoring devices in the planet. The Internet of things (IoT) which is envisioned today revolves around data. It is affecting the market and industries at an alarming rate. The advancement of such technology in our ecosystem has conceptualised the smart city paradigm. However, with the increasing rise of the IoT, Scalability becomes an issue. Scalability is term as the ability of devices adapting to the change and handling the problems of the future growing demand. Traditional IoT networks being resource constrained in nature poses a bottleneck of inefficiency for the system. In this paper, an initiative contributes towards handling the scalabilty and mobility with the Software Defined Networking (SDN) based IoT system. Our proposed protocol, 6LoWSD pertains to a new type of architecture based on the SDN concept applied to the IoT network. SDN decouples a device into its control plane and the data plane. A centralized controller manages the network paradigm. A research endeavor towards scaling the SDN-IoT network with the enhanced 6LoWSD has been performed. We simulated our protocol in the cooja platform and the experimentation results has been positive

Internet of Things ,Software Defined Network, OpenFlow, 6LoWPAN, 6LoWSD, Scalability, Mobility