[Bug 270083] [netgraph] ng_netflow, NetFlow v9: maximum packets count between re-announcing data templates is ignored
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Date: Fri, 10 Mar 2023 11:33:17 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270083
Marek Zarychta <zarychtam@plan-b.pwste.edu.pl> changed:
What |Removed |Added
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CC| |net@FreeBSD.org
--- Comment #1 from Marek Zarychta <zarychtam@plan-b.pwste.edu.pl> ---
Unfortunately, the removal of code doing re-announcements on the basis of
packet counter, according to RFC 3954, is forbidden[1], so maybe our
respectable programmers can fix it.
[1] 3. On a regular basis, the Exporter MUST send all the Template
Records and Options Template Records to refresh the Collector.
Template IDs have a limited lifetime at the Collector and MUST be
periodically refreshed. Two approaches are taken to make sure
that Templates get refreshed at the Collector:
* Every N number of Export Packets.
* On a time basis, so every N number of minutes.
Both options MUST be configurable by the user on the Exporter.
When one of these expiry conditions is met, the Exporter MUST send
the Template FlowSet and Options Template.
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