See Figure 13 . The Source Prefix aggregation scheme generates data so that you can examine the sources of network traffic passing through a NetFlow-enabled device. See Figure 14 . To coordinate flow aggregation on your router, determine the fields from which you want to collect data. Table 10 shows which fields are valid for the different aggregation schemes and which fields are part of the keys.
Key fields define a unique flow.
Version 8, a new data export version, has been added to support data exports from aggregation caches. Version 8 allows for export datagrams to contain a subset of the usual version 5 export data, which is valid for a particular aggregations scheme type. Figure 15 shows the version 8 header with the version and timestamp information. Table 11 lists definitions for terms used in the version 8 header. The flow export format version number.