SDN interchanger and controller dynamic registration method

Abstract

The invention discloses an SDN interchanger and controller dynamic registration method. The SDN interchanger and controller dynamic registration method comprises the following steps that S1, an SDN is initialized, an external configuration module informs an interchange and n controllers to establish TCP connection, and main connection is established between the interchanger and one controller and auxiliary connection is established between the interchanger and other controllers according to the priority algorithm; S2, when the main connection becomes abnormal, the interchanger sends a registration application message to one of the other controllers randomly; S3, a certain controller of the other controllers returns a registration agreeing message to the interchanger, and then new main connection is established between the controller and the interchanger. According to the SDN interchanger and controller dynamic registration method, when a fault occurs, normal services of the interchanger are not affected, and the reliability of the SDN controllers is greatly improved; meanwhile, seamless and rapid switching can be achieved, load balancing of the controllers is achieved, the method is simple and effective, and the burden of the controller is prevented from being increased.

Description

technical field [0001] The invention relates to a method for registering an SDN switch, in particular to a method for dynamically registering an SDN switch and a controller. Background technique [0002] One of the core concepts of SDN (Software Defined Network, software-defined network) is to separate the control function from the network switching device, so as to reduce the complexity of the device and improve the efficiency of network management and control. The forwarding decision of the "de-intelligent" SDN switch for data packets comes from the southbound interface of the controller. The SDN technology migrates the control plane of the switching device to a centralized controller, and replaces the control plane in the switching device with a standardized southbound interface. Therefore, whether the interaction between the SDN switch and the controller is efficient and simple becomes particularly important. [0003] As the scale of the SDN network becomes larger and ...

AI Technical Summary

Problems solved by technology

Once the controller fails, the SDN switch will not actively register with other controllers, resulting in the SDN switch being in an unmanaged state and affecting normal business

[0004] However, the current active-standby controller technology is mainly to solve the problem of failure of the main controller. If there is a problem in the link between the controller and the switch, it is difficult to effectively detect the link failure and perform active-standby switchover.

Although the active-standby controller technology can well solve the reliability problem of the single-point controller, it cannot overcome the problems of poor scalability, poor performance and large transmission delay of OpenFlow data packets

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