[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
NetFlow - path from Routers to Collector
- Subject: NetFlow - path from Routers to Collector
- From: rdobbins at arbor.net (Roland Dobbins)
- Date: Wed, 02 Sep 2015 00:12:27 +0700
- In-reply-to: <CA+3sbiPOnniOn=+sCcn6t9kQMDvW0C_s1AgxA4jjvkCgtE1gXw@mail.gmail.com>
- References: <[email protected]> <[email protected]> <[email protected]> <CA+3sbiPOnniOn=+sCcn6t9kQMDvW0C_s1AgxA4jjvkCgtE1gXw@mail.gmail.com>
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>