Research And Implementation Of SDN Based Open Source Platform Route Mapping Solution

Over the past decade, software definition networks have emerged and evolved rapidly. The OpenFlow protocol is now an important part of software-defined networks, supported by the vast majority of hardware vendors. However, the focus of SDN research is still on the second level, and the research on third level routing is relatively less. It greatly limits the size of the SDN network,hindering the SDN network layer business expansion.This thesis relies on the State Key Laboratory equipment subject research project "network-definable virtualization switching network platform" and presents a design and implementation of SDN based open source platform route mapping solution. In this thesis, a dynamic routing service system with multi-protocol support is implemented in the IP virtual network partitioned by the physical controller. To achieve the routing system, we proposes a method of dynamically managing virtual network resources based on mapping.By creating a virtual router to map the virtual network switch network, the state information of the network where the physical switch resides is synchronized to the virtual router. The virtual router implements the route calculation and sends the flow table according to the mapping. Packets perform forwarding based on the contents of the flow table. The route mapping solution is compatible with OSPF,BGP and other mainstream routing protocols. In this thesis, the design and implementation of SDN open-source platform route mapping solution are described in detail, including the underlying physical topology management, configurable high-level virtual topology, the maintenance of underlying physical topology and high-level virtual topology mapping, packet processing, routing learning and flow table issued. And then, functional tests and feasibility tests are carried out for the route mapping solutions. Thses multiple tests scenarios including multi-protocol scenarios and changing topology scenarios, which provides multi-angle and all-direction verification for SDN open-source platform route mapping solutions.