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|1. (WO2018121406) SDN-BASED PACKET MIRRORING METHOD, AND NETWORK TRAFFIC MONITORING AND MANAGEMENT SYSTEM|
|Applicants:||CHINA UNIONPAY CO., LTD.
|Title:||SDN-BASED PACKET MIRRORING METHOD, AND NETWORK TRAFFIC MONITORING AND MANAGEMENT SYSTEM|
The present invention relates to an SDN-based packet mirroring method. An SDN controller is separately coupled to an upper-layer application and at least one data switch. The method comprises the following steps: a) the upper-layer application sends a mirroring instruction to the SDN controller by means of a first northbound interface of the SDN controller; b) the SDN controller generates a second flow table on the basis of the mirroring instruction and a first flow table sent from a first data switch, the first data switch initiating transmission of a packet, the first flow table encapsulating the packet, and the second flow table comprising at least an action command corresponding to the mirroring instruction; and c) the second data switch extracts the packet from the second flow table and mirrors the packet to a specified node on the basis of the action command. The method reduces the load of a monitoring server while implementing fine-grained traffic monitoring.