A method and system for dynamic deployment of multiple controllers based on SDN

Abstract

The invention discloses an SDN-based multi-controller dynamic deployment method, comprising: using the Paxos algorithm to select a controller as the master node from a plurality of controllers adjacent to the faulty controller in the SDN network, and the master node according to the SDN network The topology structure of each follower node, the load of each follower node, and the message sent by the faulty controller during synchronization with it obtain the final migrating controller corresponding to all the switches managed by the faulty controller, and then the follower node downloads the faulty controller according to the obtained faulty controller. The final migration controllers corresponding to all the switches execute the migration process of the switches. The present invention can solve the problems in the existing multi-controller dynamic deployment method that the average response time delay of the controllers is caused by not considering the capacity limitation of the transferred-in controllers and ignoring the transmission distance between the switches and the controllers after fault recovery Added technical issues.

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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