Format Versions of NetStream Packets
The format versions of NetStream packets include V5, V8, IPFIX and V9. NetStream packets of all formats are transmitted using UDP. Each data packet contains a header and one or several stream records.
Original streams can be exported in V5, IPFIX or V9 format. Aggregated streams can be exported in V8, IPFIX or V9 format, flexible streams can be exported in V9 format.
Different from V5 or V8, the V9 and IPFIX format is used in a template, which allows traffic statistics to be exported more flexibly, new fields to be used easily, and new records to be generated easily.
Figure 1 shows the structure of a NetStream packet.
