nanog mailing list archives
Re: NetFlow - path from Routers to Collector
From: freedman () freedman net (Avi Freedman)
Date: Tue, 1 Sep 2015 20:27:10 -0400 (EDT)
(Said Roland:)
Again, to clarify - I count VLANs/VRFs as being sufficiently out-of-band to handle flow telemetry on a reasonable basis without mixing it in with customer traffic. That changes the ratio.
<snip>
I agree with you, Avi, and others that a dedicated OOB network *just for flow telemetry* doesn't make economic sense in most (any?) scenarios. What I'm saying is that it oughtn't to be mixed in with customer data-plane traffic. Ideally, all management-plane traffic would traverse a separate physical infrastructure. Since we don't live in an ideal world, virtual separation is generally Good Enough.
We see well under 20% doing logical separation but definitely folks doing it... For the definition of OOB as "separate routers and switches", we don't see anyone really sending flow over that kind of OOB network.
----------------------------------- Roland Dobbins <rdobbins () arbor net>
Avi Freedman CEO, Kentik avi at kentik dot com
Current thread:
- Re: NetFlow - path from Routers to Collector, (continued)
- Re: NetFlow - path from Routers to Collector Mark Tinka (Sep 01)
- Re: NetFlow - path from Routers to Collector Pierfrancesco Caci (Sep 01)
- Re: NetFlow - path from Routers to Collector Roland Dobbins (Sep 02)
- Re: NetFlow - path from Routers to Collector Serge Vautour (Sep 02)
- Re: NetFlow - path from Routers to Collector Roland Dobbins (Sep 02)
- Re: NetFlow - path from Routers to Collector Baldur Norddahl (Sep 02)
- Re: NetFlow - path from Routers to Collector James Bensley (Sep 11)
- RE: NetFlow - path from Routers to Collector Erik Sundberg (Sep 11)
- Re: NetFlow - path from Routers to Collector Avi Freedman (Sep 01)
- Re: NetFlow - path from Routers to Collector Roland Dobbins (Sep 01)
- Re: NetFlow - path from Routers to Collector Avi Freedman (Sep 01)
- Re: NetFlow - path from Routers to Collector Roland Dobbins (Sep 01)
- Re: NetFlow - path from Routers to Collector Avi Freedman (Sep 01)
- Re: NetFlow - path from Routers to Collector jim deleskie (Sep 01)
- Re: NetFlow - path from Routers to Collector Roland Dobbins (Sep 01)
- RE: NetFlow - path from Routers to Collector Frank Bulk (Sep 05)
- Re: NetFlow - path from Routers to Collector jim deleskie (Sep 01)
- Re: NetFlow - path from Routers to Collector Scott Weeks (Sep 01)
- Re: NetFlow - path from Routers to Collector Avi Freedman (Sep 01)
- Re: NetFlow - path from Routers to Collector Roland Dobbins (Sep 02)