Roland, While your way may be best practice, sometimes real life gets in the way of best practice. Shane On 9/1/15 1:12 PM, Roland Dobbins wrote:
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@arbor.net>