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Traditional network measurement methods can't obtain fine-grained real-time network state information, and traditional network devices are not programmable. Therefore, in order to realize network-wide detection, it is necessary to design a high-level mechanism to configure multiple INT (In-band Network Telemetry) detection paths. In order to solve the above problems, this paper studies the INT detection path configuration strategy based on adaptive algorithm and P4. In this paper, an optimal detection path configuration algorithm is proposed. In the IP layer, an adaptive algorithm is proposed to predict the traffic trend and adjust the Sel-INT (selective INT) sampling rate. At the same time, in the EON (elastic optical network) layer, the out-of-band optical link polling is decided by using INT, and P4 is used to check the consistency of data plane forwarding behavior. The research results show that, when the number of switching nodes on the forwarding path is the same, the single-path verification time of P4 in different network topologies is basically the same, and the error range is less than 3%. For a given topology diagram, the more vertices in the set. Therefore, correspondingly, the algorithm execution time has a certain decline. The simulation results verify the effectiveness of the INT detection path configuration strategy, and they all have a certain guiding role in the actual deployment.
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