Impact Analysis of Path Selection Strategies over Blockchain-based Routing in Multi-Domain SDN.

Over the past decade, one of the most commonly utilized inventions in the realm of computer communications is Software-Defined Networking (SDN). Among many other lauded advantages, the architecture of SDN supported by OpenFlow communication protocol potentially provides an End-to-End (E2E) path throughout multiple networks under the consideration of Quality of Service (QoS) metrics while supporting network administrators to manage the granular flows. We previously introduced QoSChain, which combines the benefits of SDN and blockchain technology to provide QoS for inter-networks. For the aim of enabling policy automation in cross-networks, E2E visibility, assurance, validation, and control, this framework orchestrates a software-driven traffic management system. In this study, our main focus is on the influence of various path computation options on overall QoSChain performance. In particular, we assess the effectiveness of five simple yet effective solutions for path selection: First Feasible Path Selection (FFPS), Random Feasible Path Selection (RFPS), Minimum Hop Path Selection (MHPS), FFPS with the Border Gateway Protocol (BGP) shortest path at inter-network level (FFPS_BGP), and MHPS with the BGP shortest path at inter-network level (MHPS_BGP). Our experimental results indicate that path selection is crucial to overall performance while minimizing hop counts to deliver superior performance at the expense of initially longer setup times. [ABSTRACT FROM AUTHOR]