Software defined network (SDN) controlling system, method and device

Abstract

The embodiment of the invention discloses a software defined network (SDN) controlling system, method and device. The SDN controlling system divides a network into multiple sub-domains and comprises a super-controller and domain controllers, wherein the super-controller is in charge of inter-domain control, each domain controller is in charge of intra-domain control, and the super-controller and the domain controllers perform communication according to the OpenExchange protocol; when a first terminal device and a second terminal in communications are not located in a same domain, the domain controllers send communication requests to the super-controller; the super-controller performs calculation to obtain an optimal cross-domain path of the first terminal device and the second terminal device and sends installation information of the optimal cross-domain path to the domain controllers of all paths in the optimal cross-domain path. By adopting a classification domain SDN controlling system provided by the embodiment of the invention, the SDN control network size can be expanded, the performance bottle-neck of a controller is broken through, and meanwhile, compared with an SDN distributive cluster technology, more division purviews are own; the communication traffic of information in control layer and the synchronization time delay of the information are reduced.

Description

technical field [0001] The invention relates to the technical field of the Internet, in particular to a control system, method and device for a software-defined network (SDN). Background technique [0002] In recent years, the Internet based on TCP / IP has gradually exposed many drawbacks, and Software Defined Network (SDN) has emerged as the times require. Among them, the controller is an important part of SDN. In SDN, each controller manages its own switch, and data synchronization cannot be performed between controllers. [0003] At present, distributed cluster technology is used to solve the above problems, such as figure 1 As shown: multiple controllers are set in the distributed cluster system, and one controller is randomly determined as the master controller 100, and the others are slave controllers 101. When two terminal devices 110 need to communicate, the The slave controller 101 connected to it sends a communication request, calculates the communication path fr...

AI Technical Summary

Problems solved by technology

However, the frequency of asynchronous events in the network is very high. Synchronizing the network data change information generated by each event to all controllers will cause a very large amount of synchronous data, which will greatly increase the pressure on data transmission in the network and cause synchronization. The delay is too long

Images