Host discovery method and system based on SDN

Abstract

The invention provides a host discovery method and system based on an SDN. The method comprises steps that 1) a controller obtains switch topology information of a whole network; 2) the controller generates a switch-level broadcast tree based on the switch topology information of the whole network and a tree establishment tree, and configures and distributes related flow tables for each switch according to the generated broadcast tree; and 3) each switch forwards ARP host searching information according to the distributed flow tables, the ARP host searching information is enabled to be broadcasted in the whole network along the broadcast tree, and a target host can be found in an effective manner. The controller is freed from the tedious host discovery task which is handled by each switch, and thus the workload of the controller is lowered, and the controller is enabled to have more functions to deal with other management and control work in the SDN. The host searching information is enabled to be broadcasted in the whole network along the switch-level broadcast tree in a radiating mode, and thus the effective host discovery is achieved.

Description

technical field [0001] The invention belongs to the technical field of network broadcasting, and in particular relates to an SDN-based host discovery method and system. Background technique [0002] With the development of virtualization technology, big data and cloud computing, whether it is in IT, Industry 4.0, city management, or in the fields of economy, entertainment, education, etc., it is required that the large second-tier network of the data center can accommodate tens of millions or even Capability of hundreds of millions of hosts. Therefore, how to implement good management on a large number of hosts, especially how to quickly and effectively realize the discovery and search of the destination host will be very difficult. At this time, an efficient host discovery method and system will appear very important. [0003] However, many existing technologies (for example, G.Singh and A.J.Bernstein, "A Highly Asynchronous Minimum Spanning Tree Protocol," Distributed Co...

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Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a method and system for discovering hosts based on SDN, which is used to solve the problems of large network range, heavy controller load, and low efficiency of host discovery in the prior art.

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