A flow control method, dpi device and system

Abstract

Embodiments of the present invention provide a flow control method, DPI equipment and system, which relate to the communication field and can ensure the accuracy of flow control while avoiding the cascading effect of links. The method includes: acquiring a control strategy for a serial DPI module and a parallel DPI module in the DPI device; controlling the service transmission link in series with the DPI device, and simultaneously starting the serial DPI module for flow control; when the first preset condition is met, Disconnect the series DPI module, control the service transmission link to be connected in parallel with the DPI device, and start the parallel DPI module at the same time to perform flow control. The first preset condition includes at least one of the following situations: the difference between the flow rate entering and leaving the DPI device exceeds the flow rate threshold And the parallel DPI is not faulty, the processing delay of the DPI device exceeds the time threshold and the parallel DPI is not faulty, the serial DPI module is faulty and the parallel DPI is not faulty.

Description

technical field [0001] The present invention relates to the communication field, in particular to a flow control method, DPI (Deep Packet Inspection, deep packet inspection) equipment and system. Background technique [0002] With the increasing number of network applications, especially the increase of applications such as P2P (Point to Point, point-to-point), the traffic on the network has increased greatly, the bandwidth utilization rate of the link has gradually increased, and even network congestion has occurred, reducing the network traffic. stability. The traffic on the existing network is huge, the protocol types are complex and diverse, and the traffic components change in real time. Therefore, the existing network urgently needs to deeply sense and analyze the network traffic type, and complete link status monitoring and traffic control. [0003] Currently, a commonly used identification and flow control method for network data flow services is the DPI technology....

AI Technical Summary

Problems solved by technology

[0004] The serial DPI device is connected in series with the service transmission link, and the serial algorithm is used to control the traffic by using the serial algorithm, that is, the packets that get the token pass through, and the packets that do not get the token are discarded, and the traffic control has a high accuracy. , but because the downlink traffic rate of the DPI device is suppressed and the uplink traffic rate cannot be suppressed, resulting in a ladder effect on the link

The parallel connection of DPI equipment and service transmission links will not cause the link to have a ladder effect, but because the parallel algorithm is used to control the flow by constructing false messages to interrupt service transmission, the accuracy of flow control is low

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