NetFlow - path from Routers to Collector
Roland Dobbins
rdobbins at arbor.net
Tue Sep 1 17:12:27 UTC 2015
On 2 Sep 2015, at 0:08, Steve Meuse wrote:
> Your advice is not "one size fits all".
Actually, it is.
Large backbone networks have DCNs/OOBs, and that's where they export
their NDE.
> I've done netflow over production links for two very large backbone
> networks.
Did you manage your routers and switches and hosts and so forth in-band,
too?
> Over the combined 17(?) years, never saw a problem.
Until you do.
Running flow telemetry in-band is penny-wise and pound-foolish, for
networks of any size, in any circumstances. All management-plane
traffic (and that's what flow telemetry is) should be segregated from
the production network data plane.
-----------------------------------
Roland Dobbins <rdobbins at arbor.net>
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