Research And Implementation Of Software-defined Networking Multi-domain Service Negotiation Mechanism

With the development of network technology,SDN(Software Defined Networking)networks are expanding in application requirements and service areas.SDN network technology and its applications inevitably extend to multiple management domains.Collaborative management of network resources among different domains has always been a relatively difficult problem in the telecommunication network and the Internet.In the existing SDN environment,multi-domain service management also does not have a good solution.In the process of cross-domain service completion,in order to efficiently and flexibly manage the network resources of multiple SDN management domains,a multi-domain service collaboration mechanism based on SDN technology is proposed.Firstly,using the theory of network calculus to model the network service quality in the management domain,the model can also be applied to multi-domain network services to obtain network service quality data that satisfies multi-domain service.This model makes the SDN domain controller provide only necessary data to cross-domain service collaboration platform.The details of the network infrastructure will not be revealed.Based on this,a service cooperation scheme that can be used in the cross-domain service collaboration platform is designed.The SDN controllers of different management domains can perform service parameter coordination for a specific service requests and determine the minimum network service quality that can satisfy the service,thereby establish a service level agreement.The test results show that the cross-domain service collaboration mechanism achieves the collaboration of the network service quality of multiple SDN domains by obtaining the network service quality models of different management domains,so as to meet the cross-domain service requirements.This method can reduce the bandwidth allocation and increase the bandwidth utilization at the same delay.The mechanism can obtain user service requests through different service interfaces,make reasonable use of controller resources,effectively reduce the number of forwarding flow in the flow table,and improve service quality.