Virtual Network Service Orchestration And Rapid Migration System In SDN

Software Defined Network(SDN)breaks the traditional network architecture and proposes a new network model that separates data from forwarding.Network Function Virtualization(NFV)provides a new way to design,deploy,and manage network services and separate network functions from proprietary hardware devices so that they can run in software.Docker provides a lightweight network function virtualization vehicle that virtualizes related network elements in a lightweight container.However,the current virtual network management platform is still using SDN for network optimization alone,or using NFV and Docker for virtual network construction,it is still difficult to build an agile virtual network management platform.This paper proposes a network service orchestration and rapid migration system in the SDN environment.First,a virtual tenant network(VTN)-based virtual link network(VLN)is completed in the SDN controller,and the physical network can be mapped to the virtual network through the VLN.However,the model still does not solve the migration problem between physical nodes.Therefore,we apply NFV and Docker to perform physical node virtualization to solve migration problems.In addition,IoT devices are considered part of a virtual network,consist of different logical networks,and are reused in different services.This paper integrates the VLN and NFV service function chain(SFC)of the SDN controller to complete a complete virtual network layout system.Using Docker to encapsulate NFV-related VNFs,such as firewalls and load balancer,is not only easy to deploy,but also supports failover and resource migration.This article implements a complete virtual network layout through SDN and NFV,and completes port mapping and MAC address mapping.We have designed a self-discovery mechanism for resources,through which host discovery of virtual networks becomes extremely simple and does not need to be executed through terminal commands.The system architecture can access the physical nodes of the virtual network(VN),perform traffic control according to the quality of service(QoS)of different tenants,and extend the mechanism of bandwidth traffic packet parsing control to implement complete virtual network orchestration and migration functions.The experimental results verify that the system combines the technical advantages of SDN,NFV and Docker,realizes network virtualization of flexible resources,convenient network construction,disaster recovery and reconstruction,and rapid migration of VM and Docker.The test results show that the system can well expand the virtual network and successfully meet the tenant's requirements for the construction and operation of the SDN network.