Research And Implementation On SDN-based Inter-domain Multipath Routing Protocol

With the development of Internet technology,the scale of data transmission in the Internet is growing rapidly.Currently,the large-scale data transmission adopts BGP as the inter-domain routing protocol.As a single-path routing protocol,BGP has the problems of poor data transmission reliability and low transmission efficiency.The existing multipath protocols have poor path diversity,long convergence time and lack of flexible control method.SDN technology provide a new technical support to solve the above problems.However,the existing SDN-based solution for large-scale data transmission in wide area network(WAN)are mostly based on BGP,still can not effectively solve the inherent problems of BGP,such as poor path diversity,slow convergence and so on.Therefore,this paper proposes a SDN-based inter-domain multipath routing protocol for the existing problems of large-scale data transmission in wide area network.The main work includes the following aspects:(1)SDN-based inter-domain multipath routing protocol model.In order to improve the flexibility control of large-scale data transmission in the WAN,the SDN idea is introduced into the inter-domain routing protocol for the performance requirements of the underlying transmission equipment.The scalability of the system,Based on the diversity of routing paths,the SDN-based inter-domain multipath routing protocol model is designed to establish the protocol entity and protocol interaction flow in the routing protocol model,which provides the basis for further design of routing protocol messages and routing algorithms.(2)SDN-based inter-domain multipath routing protocol messages.Based on the design of the routing protocol model,this paper studies the specific protocol interaction process,the timing relationship between the protocol messages,the routing protocol message format,and the routing protocol message processing flow from the point of view of rich path diversity,and completes design of the routing protocol message.Collect the global network topology information to achieve the basis for the calculation of inter-domain routing path;(3)SDN-based inter-domain multipath routing algorithm.On the basis of the completion of 1,2,the design of SDN-based inter-domain multipath routing routing algorithm to build a global network topology,the calculation of multiple inter-domain routing path.Through the inter-domain multi-path transmission at the same time,to improve the transmission efficiency of large-scale data transmission.In this paper,we proposed a SDN-based inter-domain multipath routing protocol for the large-scale data transmission in the wide area network.The routing protocol model,routing protocol message and routing algorithm are introduced in detail.SIMRP routing protocol,and through a series of simulation experiments and experimental platform experiments to verify the feasibility of this paper and the effectiveness of the results.