Dynamic flow dispatch method and system based on software definition network

Abstract

The invention provides a dynamic flow dispatch method and system based on a software definition network. The method comprises a step of carrying out deep analysis of flow through flow information uploaded by a switch, and classifying flow types by a flow identification and grading module according to priorities, a step of calling a statistic management module to obtain information of switch ports, calculating joint links of the switch, and sending information of the joint links to a topology management module, a step of calling the topology management module to obtain a feasible path for flow direction and calculating real-time sate statistic information of the feasible path, and a step of analyzing features of the joint links to calculate weight of the joint links in the overall selection, working out the optimal dispatch strategy based on the weight and giving out the optimal dispatch strategy. The invention can achieve the optimal real-time dispatch of network flow, so that flow is enabled to reach a destination in a fastest manner, and purposes of improving the bandwidth utilization rate and optimizing network performances are finally realized.

Description

technical field [0001] The invention relates to a dynamic flow scheduling method and system based on a software-defined network, belonging to the field of computer networks. Background technique [0002] With the rapid development of Internet technology, network traffic maintains exponential growth, which increases the pressure on the deployment and maintenance of existing networks. In particular, the crazy growth of streaming media services with a large amount of data and video-on-demand services puts forward higher requirements on network performance. The proportion of continuous and stable traffic is gradually increasing, and the existing network is inefficient. In this case, improving network performance, increasing link utilization, improving data transmission reliability, and accelerating traffic forwarding efficiency have become network problems that need to be solved urgently. [0003] IETF has proposed its own solution to this problem—traffic engineering. Traffic ...

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Problems solved by technology

Moreover, all routing configurations in this network are mostly static. If dynamic configuration is used, coordination between routers is also required. This is still the case for small networks with limited forwarding equipment, but using this method for large-scale forwarding equipment will not improve network performance. Instead, it caused a large delay

[0006] Because the forwarding device control logic and data forwarding under the distributed architecture are centralized, it is not possible to uniformly manage and control the entire network

In such a case, first of all, the link status of the entire network cannot be uniformly obtained, which is not conducive to controlling the health of the entire network path. For example, figure 1 If the bandwidth utilization of path 2 in the network is almost saturated, and there is little traffic passing through path 1, then there will be problems in the traditional network, because it is obvious that the optimal path at this time is path 1, but because the traditional network cannot Real-time link status to change the corresponding forwarding strategy, resulting in inefficient utilization of network resources, and also violates the original intention of traffic engineering

[0007] At present, the existing technology is still in how to make the data packets realize the connection of devices in the software-defined network, and the efficiency has not been sufficiently improved.

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