Reserch On SDN Based VxLAN Optimization Mechanism

In recent years,the structure of the data center network continues to change,new technologies are also emerging.Today's data center network has evolved into a large multi-tenant network,with millions of virtual machines and a large number of tenants,faced with the limited resources in the network to meet the high bandwidth requirements,but also deal with virtual machine Of the multiple challenges of frequent migration.This paper is based on SDN(Soft Defined Network)VXLAN(Virtual eXtensible Local Area Network)is proposed in this contextFirstly,the paper introduces the principle of VXLAN technology and the problem of VM migration and load balancing for data center network,and analyzes the shortcomings of the current solution.The VXLAN architecture based on intelligent SDN is proposed,and the concept of intelligent center is introduced.For virtual machine migration,under the new architecture,the virtual machine can continue to connect with other virtual machines during the migration process and keep the data from being lost.Aiming at the problem of load balancing,a solution based on distributed gateway framework is proposed,which can accomplish automatic load balancing without hardware modification.The performance of the virtual machine migration and the automatic load balancing scheme was verified by software simulation.An optimization scheme of VXLAN forwarding technology based on SDN is proposed.The global topology information is acquired and stored in the database in real time by the monitoring module of intelligent center.The forwarding process of VXLAN network is optimized by the centralized management capability of SDN controller.The round-trip transmission time of different schemes is compared by Mininet simulation,which proves that the forwarding scheme can improve the forwarding performance of the data center network.