V7 is not compatible with Cisco routers. The first field of the header contains the version number of the export datagram. Typically, a receiving application that accepts any of the format versions allocates a buffer large enough for the largest possible datagram from any of the format versions and then uses the header to determine how to interpret the datagram. The second field in the header contains the number of records in the datagram and should be used to search through the records.
All fields described in the format version tables are in network byte order.
Table B-7 describes the V8 header format. Table B-8 describes the V8 RouterAS flow record format. Table B-9 describes the V8 RouterProtoPort flow record. RouterDstPrefix flow record. Note V8 data consists of header information that follows the same format as the other versions.