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9. Appendix A

9.1 Version 1 flow-export

Version 1 flow-export packets contain a flow header followed by a number of flow entries. The number of flow entries in the packet is in the count field in the flow header.

Unlike version 5 flow-export, version 1 does not have sequence number information, AS numbers of netmask lengths. It is hence largely irrelevant in a network service provider environment.

Figure 4: version 1 flow-export flow header

Figure 5: version 1 flow-export flow entry

9.2 Version 5 flow-export

Version 5 flow-export packets contain a flow header followed by a number of flow entries. The number of flow entries in the packet is in the count field in the flow header.

Unlike version 1 flow-export, version 5 flow-export has AS numbers and netmask lengths for the source and destination.

Figure 6: version 5 flow-export flow header

Figure 7: version 5 flow-export flow entry


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