The Network Model Research Based On OpenStack Open Source Cloud Platform

With the coming of the cloud era,all kinds of cloud management platform arisesbased on IAAS at the historic moment，Such as the amazon’s EC2and S3cloudinfrastructure, etc..Because of the advantages of open source, The OpenStack cloudplatform has been supported by more and more enterprises and individual developers.It is designed to simplify the deployment process of cloud platform and its componentarchitecture for its good expansibilityCloud computing is the product,which is based on the virtualization.and itssource incliuding computing,storeage,network will become the service lists. The trendfor OpenStack cloud platform is as well. From the Angle of the development of thenetwork, the early network components that is Nova_network structure is toosimple,and can not fully meet the customer requirements. And along with theexpansion of the scale, also can’t satisfy the performance requirement.In later versions, following the network as a service concept, Quantum networkmodel was proposed,it centrally reflect the way of “Evolution form” of SDN model:Cloud tenant can create their own network topology via API provided byQuantum.and at the same time be able to configure virtual network equipment, etc.For cloud computing Network,SDN(Software Defined Network)model has beenbecome a trend, Quantum embodies a kind of SDN is implemented,and it support themulti-tenant cloud,and it extends the virtual Network world from the server side tothe client. But Quantum networks also showed a lot of disadvantages: one is thatvirtual network that it created is On top of the network layer, the connectionterminal is the virtual machine level, rather than a higher level of physical devices,secondly, its portability is poorer, its just as the network management system on theplatform.For Quantum networks of these phenomena and status of development ofthe current network: because the TCP/IP network architecture has entrenched, in the face of the defects at the beginning of the design, using more agreements to fixthis architecture can not fundamentally solve the problem.futher with the moreprotocol, network equipment load is heavier,so it will cause there will be a lot ofproblems. Another SDN model-OpenFlow model abstracts the concept of datastream from the network control level solve these problems.Unlike previous network architecture, OpenFlow use the architecture ofcontrol layer and Forward layer separation to complete the data flow of work. On itscontrol level, we can fully validated innovation network system and the protocolby component development.This article highly describe development of theOpenStack network model and combining the development trend of OpenFlow, mergeit on the platform, and now the latest version has verified the model. On the basis ofthe model, considering the OpenFlow drawbacks, I realized the routing protocol.First the analysis of packet transmission base on current existing networkarchitecture,and find out the cause of the OpenFlow model can’t routing.Secondly, through modified the action of OpenFlow protocol about ARP packetand ICMP packet processing.and implement the component of link Found andRouting protocol on the platform nox controller.Finally,on the OpenFlow Mininet simulation platform and Nox controller to testand verify, and has made the summary and outlook for the current study, researchershope later on the basis of the further deeper.