NetFlow is sent to the collector from a dedicated DPI interface, typically the mgmt interface which is used for SSH access, RADIUS integration, etc.
*There can only be one stream of the same type. If it is necessary to send to several sources, re-export from the QoE module or other collectors is used.
The bandwidth required to export NetFlow data is typically less than 0.5% of the total bandwidth consumption. For example, if you are monitoring a link using 100 Gbps, DPI will use less than 0.5 Gbps to export NetFlow data.
DPI accumulates statistics and transmits it to the collector at a specified frequency. Based on the principles of DPI operation, statistics will always be uploaded with some delay depending on the time intervals set in the configuration file.