nanog mailing list archives

Re: NetFlow - path from Routers to Collector


From: Tarko Tikan <tarko () lanparty ee>
Date: Tue, 1 Sep 2015 22:47:09 +0300

hey,

It should've already been spent for an OOB/DCN network, which should've
been provisioned with flow telemetry in mind.

Bad advice. No amount of money will fix major platforms that are not happy to export flow telemetry via router management ports. Sometimes it can be done via nasty vrf leaking hacks, sometimes it cannot be done at all. Management ports are typically directly connected to routing engines while netflow data is generated in hardware in PFE.

In-band netflow works on all platforms without such issues.

--
tarko


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