Method for multi-controller load balancing based on distributed-centralized architecture model in software-defined network

Abstract

Currently, in software-defined networks, there are mainly two multi-controller architecture models: a distributed multi-controller architecture model and a centralized multi-controller architecture model. These two architecture models have both advantages and disadvantages: although the distributed multi-control architecture model can effectively avoid the performance and reliability problems of a single controller, the time delay for transmitting messages between multiple distributed controllers is relatively slow. Long; although the centralized multi-controller architecture model can effectively reduce the delay of message transmission between controllers, there are still various disadvantages of centralized control. Therefore, the present invention proposes a distributed-centralized multi-controller architecture model to avoid the shortcomings of previous architecture models. On this basis, a multi-controller load balancing method based on the distributed-centralized architecture model is also proposed, so that the load of the entire network can be evenly distributed.

Description

technical field [0001] The invention relates to the field of network technology, in particular to software-defined network technology. Background technique [0002] With the rapid development of mobile Internet, big data, cloud computing, etc., the traditional network technology framework can no longer meet the growth of usage requirements. In this context, software-defined networking (Software Defined The network architecture is proposed. The main feature of the SDN network is to decouple the control plane and data plane of the network and support centralized network management. Among them, the controller is responsible for the control of the entire network, and needs to grasp the network view as a whole to improve the delivery quality of the network. [0003] Centralized network control makes the controller take on greater responsibilities. If the entire network uses a single controller, there will be the following problems: [0004] 1. If there is a security problem or ...

AI Technical Summary

Problems solved by technology

[0004] 1. If there is a security problem or fault in the controller, it will directly affect the normal operation of the switching equipment in the entire network, resulting in a decline in the service capability of the SDN network, or even paralysis of the entire network

[0005] 2. As the number of switching devices increases, the traffic between a single controller and switching devices increases, but the bandwidth of a single controller is limited

[0006] 3. As the scale of the network increases, there will be a long time delay when the switching device at the edge communicates with the controller

Although this architecture model reduces the information transmission delay between multiple controllers due to the emergence of super controllers, it still has various drawbacks in centralized network control due to the centralized management on multiple controllers.

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