Hi Andrew,
Hmm .. this seems to be a bit confusing to me. As I understand the v9 spec,
it should be clear, that how to interpret tstart and tend of a flow. Is there
a spec of Juniper, how to deal properly with these values? Your approach seams
to be rather heuristic, although I understand the motivation. However, there
is another problem: 'now' The collector does not save the collected time, only
the flow reported time. bps and bps are calculated by nfdump at runtime. So
nfdump has no clue about 'now'. I'm afraid, that there is not much I could do.
What should help though, is aggregation. If you aggregate all flows of a
connection, the accumulated timestamps should be coeect, and therefore the
bps and pps.
Regards
- Peter
On 10/8/12 9:29 AM, Andrew Jones wrote:
> Hi,
> Due to the way that juniper's jflow v9 implementation keeps the original
> start time of the exported flows, even with the active-timeout set to 60
> seconds, nfdump's calculated pps and bps are incorrect. Is there a way to
> tell nfdump that all flows are exported every 60 seconds, so that pps and
> bps values are correct?
>
> Eg. if ( now - flow-start-time ) > 60 seconds { flow-life-time = 60
> seconds }
>
> Any input is appreciated.
> Thanks,
> Andrew
>
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Be nice to your netflow data. Use NfSen and nfdump :)
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