Design And Implementation Of SDN Orchestration System In Network Orchestrator

With the continuous development of network technology,the network business has become numerous and diverse,the network size has also become more and more huge,and the traditional network architecture has become more and more difficult to maintain due to the inflexibility of infrastructure facilities.How to manage the infrastructure effectively and deploy services flexibly has become a problem in network management.The development of SDN(Software Defined Network),NFV(Network Function Virtualization)and network orchestration technology provides a new idea to this problem.The collaborative work of these three technology can achieve centralized infrastructure management and automated services deployment,which greatly improve the efficiency of network management.In recent years,experimental network platform based on SDN/NFV has been widely constructed and network orchestration technology has become a new solution to these experimental network platform in management aspect.However,current open source network orchestrators are all aimed at the complicated application scenarios of enterprise networks,and its systems architecture is huge,and its deployment is complicated,which make it unsuitable for the current experimental network platform.Therefore,it is necessary to design a new network orchestrator suitable for experimental network platform.The subject relies on the state key laboratory equipment research and development projects "Network Definable Virtualization Switching Network Platform".A orchestrator user-oriented,suitable for experimental network platform,lightweight orchestrator architecture is proposed in this subject.This orchestrator architecture aimed at centralized infrastructure management and automated services deployment.As an important part of this subject,in this thesis,the SDN orchestration subsystem is designed and implemented and the SDN orchestration process is verified.This thesis first studies the principle of SDN and network orchestration technology,and deconstructs and analyzes the mainstream open source orchestrator.Then its demand analysis,architecture design and orchestration process is conducted.Furthermore,this thesis studies implementation of the function module of the SDN orchestration subsystem and then completes the design and implementation of each module.Finally,the SDN orchestration subsystem is deployed on the experimental network platform and functional testing is conducted.The test results show that the SDN orchestration subsystem meets the requirements of the network orchestrator and can cooperate with other subsystems to complete the network service orchestration.