Why is rwflowpack discarding the flow interfaces and Next Hop IP?
In our experience, the flow interfaces (or SNMP interfaces) and Next Hop IP do not provide much useful information for security analysis, and by default SiLK does not include them in our packed data files. However, if you wish to store these values or use them for debugging your packing configuration, you can instruct rwflowpack to store the SNMP interfaces and Next Hop IP by giving the it the –pack-interfaces switch.