Research On Multicast Routing Method For Data Center Networks Based On Port Addressing

In the information age,cloud computing technology is in the ascendant,which has promoted the rapid development of data centers.As the core communication facility of cloud computing,data center network is expanding continuously.How to store,transmit,and calculate massive data information has become the main task of the current data center network.Many applications in the data center network have the requirements of group communication,and the multicast routing methods directly affect the performance of the data center network.Due to the problems of unicast communication,for example,a large number of identical data packets in the network,excessive load pressure on the network backbone,network congestion,and serious waste of bandwidth resources.Multicast communication has received widespread attention from all walks of life.More and more scholars have proposed multicast routing methods suitable for different topological structures of data center network.This thesis mainly focuses on the multicast routing method based on port addressing in the data center network.The current data center network architecture is mainly divided into two types: one is switch-oriented network structure,such as fat-tree,and the other is server-centric network structure,such as BCube.We design a multicast routing algorithm which based on port addressing for data center network,it draws on the concept of port addressing in the vector network,uses the output ports of the terminal equipment and the forwarding equipment as the basis for data forwarding,and comprehensively considers the load pressure of multicast data sender.The algorithm will build a multicast distribution tree,which can maximize the load balance between the multicast data receivers and the multicast data senders in the data center network and avoid excessive load pressure on some nodes of the multicast distribution tree,in addition,it can also reduce the multicast data packet loss rate and improve the reliability of multicast communication.Traditional methods for restoring multicast data packets in the case of link failures mostly use the original path of the multicast tree to resend the data packets.This method usually causes excessive load pressure on the original path,which increases the failure rate of data recovery.Data center networks are different from IP networks or other networks.There are redundant links in the network,and there are usually multiple data forwarding paths between communication nodes.The thesis proposes to maintain a failed node recovery mapping table to provide query and periodic update methods.By calculating the optimal solution for node recovery,a one-to-one data recovery method is adopted to perform failure recovery between nodes,which will reduce the risk of failure of the entire link,realize data retransmission between failed nodes in the shortest time and complete the communication of multicast data.We verify the feasibility and effectiveness of the algorithm of Port Address Multicast Routing through the evaluation of different performance indicators.