Method and system for dynamically adjusting topological structures of underlying network spanning trees

Abstract

The invention provides a method and system for dynamically adjusting topological structures of underlying network spanning trees. The method comprises following steps: periodically obtaining load information of an underlying network switch; calculating the total weight of a current underlying network spanning tree in real time according to the load information; determining a minimum spanning tree according to the total weight of the current underlying network spanning trees and dynamically adjusting the topological structures of the network spanning trees. The system comprises an information collection module and an STP (Spanning Tree Protocol) module. According to the invention, the underlying network switch is managed and controlled centrally through an SDN (Software Defined Network) controller; an OpenFlow protocol module is taken as a management interface; the topological identification function of the underlying network is finished and the spanning tree structures are constructed on the controller. In the operation process of the network, the controller obtains the forwarding traffic information of the underlying network switch in real time; some backup link bandwidths are used; therefore, the dynamic load equalizing function of the network is realized; and the condition that the second network business forwarding appears loop and forms network storm is prevented.

Description

technical field [0001] The present invention relates to the technical field of computer networks, in particular to a method and a system for dynamically adjusting the topological structure of the underlying network spanning tree based on the OpenFlow protocol. Background technique [0002] In traditional Layer 2 networks, topology identification and acyclic processing mainly rely on Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol (RSTP), but both STP and RSTP have many defects. : When the network scale is relatively large, it will lead to a long convergence time; the mechanism of the STP protocol is to block the port of the redundant link to avoid network loops. When the link is blocked, it will not carry any traffic, resulting in a decrease in bandwidth It is extremely wasteful, and during the entire network communication process, the topology cannot be changed due to slow convergence problems. And some subsequent protocols were proposed to solve the above pr...

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Problems solved by technology

[0006] The object of the present invention is to provide a method and system for dynamically adjusting the topology structure of the underlying network spanning tree to solve the problems in the prior art that OpenFlow topology discovery and STP construction methods lack dynamic load balancing functions and minimum spanning tree structures

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