| Summary: | 碩士 === 國立中央大學 === 資訊工程研究所 === 99 === Due to the rapid development of the internet and the rise of various internet technologies, the structure of the internet has become more and more complex. Hence, in order to deploy a new network in the current internet structure, virtual network and Service Level Agreement (SLA) to provide customers a stable service quality for service quality is even highly demanded than before. As a result, how to provide a flexible network environment to improve SLA achievement becomes a big issue.
For improving SLA Achievement on virtual network, this paper proposed an SLA Oriented Shortest Path First (SO-SPF) mechanism on the NetFPGA. The SO-SPF will change the flow transmission path dynamically when SLA occured violation. The system architecture is composed of Management Station (MS) and Managed Nodes (MN) carried NetFPGA. MS communicates with MN through OpenFlow project. This paper makes comparison between no mechanism, SPF mechanism and SO-SPF mechanism by conducting multi flow experiment. When violation happens, SPF will choose another paths to improve violation duration time. SO-SPF is not only better than no mechanism, but also SPF because it chooses a better transmission path according to network statements, SLA statements, and SPF result. In the last experiment, it can see that the violation time that SO-SPF is less than SPF.
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