Self-adaptive low-cost SDN network link utilization rate measurement method and system

Abstract

The invention discloses a self-adaptive low-cost SDN network link utilization rate measurement method and system. The method comprises the steps of S1, defining SDN network link utilization rate measurement related parameters; S2, initializing the parameters; S3, sensing a FlowRemoved message, if the message is sensed, calculating a link utilization rate I_T _LinkUtil, skipping to a step S4, if the message is not sensed, calculating the link utilization rate I_T_LinkUtil based on an active measurement mode, and skipping to the step S5; S4, collecting statistics information of data streams based on a passive measurement mode, and sending the FlowRemoved message; S6, collecting the statistics information of the data streams based on an active measurement mode, sending a FlowStatistics-Request message to a switch; S6, extracting the statistics information of the data streams and recording the statistics information; S7, calculating a contribution rate of each data stream to the link utilization rate in sequence and recording the contribution rates; S8, adding up member variables of I_T_F_LinkUtil [], calculating to obtain the link utilization rate I_T_LinkUtil of an interface corresponding to a cycle point, and recording the link utilization rate I_T_LinkUtil; and S9, adjusting a search cycle T. The method and the system have the advantages of simple principle, wide application range and high measurement precision.

Description

technical field [0001] The invention mainly relates to the field of SDN network technology, in particular to an adaptive low-cost SDN network link utilization measurement method. Background technique [0002] The measurement of network link utilization is an important part of network management. On the one hand, it helps to discover link bottlenecks in time and provides data support for routing optimization. It not only ensures the performance quality of application services, but also realizes the reduction of operating costs of operators On the other hand, it is helpful for reasonable planning of network link capacity, avoiding problems such as massive waste of resources or frequent occurrence of link bottlenecks. Therefore, timely and accurate measurement of network link utilization is of great significance to improve network management efficiency. [0003] For SDN networks (such as data center networks, large-scale campus networks, etc.), due to the centralized managemen...

AI Technical Summary

Problems solved by technology

This method will not generate too much load on the network, but its accuracy is completely dependent on the accurate measurement of the time interval of this adjacent data packet on the entire path, which has two shortcomings: one is the link utilization rate The measurement is not timely enough and lacks sensitivity; the second is that less background interference is required, and the SDN network traffic is highly dynamic and the environment is unstable

[0014] 1) Relying on active detection messages will bring a large measurement load to the network;

[0015] 2) The measurement granularity is large, which cannot meet the performance management requirements of cloud data centers and large-scale campus networks;

[0016] 3) The measurement error is large. Due to the dynamic change of the data flow height, the method based on the change of the message length and the message interval has limitations, and the tomography based on the statistical method itself has errors

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