| المستخلص: |
Software Defined Networks (SDN) are currently the foremost promising researched area within the world of computer networking, many research implementation is undergoing in making advances within the sphere of Software Defined networks. The increase of demand for moving from traditional networks to SDNs has given rise to many challenges. Software-defined Networks are continuously advancing, which demands the requirement to unravel the issues of scalability, transmission delays, and packet loss. The large the network, more the delay like the rise within the network causes network congestion and transmission delays, single controller architecture are inefficient to manage the larger networks, Software Defined Architecture with multiple controllers has been introduced within the recent researches to resolve this issue. Multiple controller SDN architectures are be efficient to manage larger networks, decrease transmission loss and avoid fault tolerance. Because the network expands the load on the sole controller increases, so it becomes difficult for single controller architecture to efficiently manage the network. Multiple controllers tackle the network congestion issue by distributing the load between them. During this thesis, evaluate the performance of multiple controller SDN architectures and compared it with single controller SDN architecture. The Multiple controller architectures have better load management, less transmission delay, and fewer packet ratio. The multi-controllers SDN architecture could even be a more efficient solution than single controller architecture when it involves wider networks. Within the experiment, POX SDN controller used to implement the Software Defined architecture, mininet as a network emulator to test complex topologies and D-ITG to test the results of intense network traffic on topologies in numerous SDN architectures.
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