[183386] in North American Network Operators' Group
Re: NetFlow - path from Routers to Collector
daemon@ATHENA.MIT.EDU (Steve Meuse)
Tue Sep 1 13:08:12 2015
X-Original-To: nanog@nanog.org
In-Reply-To: <1947B6D4-994D-4C04-AFE9-D940BCE8FE7E@arbor.net>
Date: Tue, 1 Sep 2015 13:08:08 -0400
From: Steve Meuse <smeuse@mara.org>
To: Roland Dobbins <rdobbins@arbor.net>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Tue, Sep 1, 2015 at 12:14 PM, Roland Dobbins <rdobbins@arbor.net> wrote:
> On 1 Sep 2015, at 23:10, Job Snijders wrote:
>
> > To answer your first question: i see no issue in transporting flow
> > export traffic over the same backbone used to serve customer traffic.
>
> This is not good advice, for the reasons I stated previously in this
> thread.
Your advice is not "one size fits all".
I've done netflow over production links for two very large backbone
networks. Over the combined 17(?) years, never saw a problem. If your
network is likely to be partitioned by a small number of failures, that
might be a different case, but you can't make blanket statements.
-Steve
