SDN-based multi-controller dynamic deployment method and system

Abstract

The invention discloses a software defined network (SDN)-based multi-controller dynamic deployment method, including the following steps: using a Paxos algorithm to select one controller as a master node from multiple controllers adjacent to a fault controller in the SDN, enabling the master node to acquire final immigration controllers corresponding to all switches managed by the fault controlleraccording to the topology structure of the SDN network, the load state of each following node, and messages sent in the process that the fault server and the master node are in synchronization, and then enabling the following nodes to execute an immigration process of the switches according to the obtained final immigration controllers corresponding to all the switches under the fault controller.The scheme of the invention solves the technical problem of increased average response time delay of the controllers caused by that in an existing multi-controller dynamic deployment method, capacitylimitation of the immigration controllers is not considered and the transmission distances between the switches and the controllers after the fault recovery are neglected.

Description

technical field [0001] The invention belongs to the technical field of computer networks, and more specifically, relates to an SDN-based multi-controller dynamic deployment method and system. Background technique [0002] With the rapid development of information technology, the Internet has penetrated into people's daily life, and people's demand for the Internet is also increasing. However, the traditional network architecture has poor stability and is difficult to innovate, thus hindering the development of the Internet. For this reason, Software Defined Network (SDN for short) was proposed as a new type of network architecture in 2008, and was quickly recognized by academia and industry. Different from the concept of the traditional network architecture, SDN separates the control right from the network equipment and hands it over to a centralized controller for unified management. It also provides an open programmable interface to simplify network configuration and serv...

AI Technical Summary

Problems solved by technology

[0005] However, the above two methods of multi-controller dynamic deployment have shortcomings: First, they both ignore the capacity limit of the imported controllers, which will cause the newly imported controllers to be overloaded, which will further reduce the average response time of the controllers. In addition, they do not consider the transmission distance between the switch and the controller after the failure is restored. If the transmission distance between the two is too long, the average response delay of the controller will increase.

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