Re: Flow Tools AS-Path

["Dobbins, Roland via NANOG" <nanog () nanog org>]

On 4 Apr 2023, at 21:48, Peter Phaal <peter.phaal () gmail com<mailto:peter.phaal () gmail com>> wrote:

Export of destination AS-Path is supported in the sFlow extended_gateway structure.

As a consumer of sFlow, [as well as NetFlow, IPFIX, etc.] I haven’t run into the use of this option in production, FWIW.

In addition to BGP, there are a number of MPLS, tunnel encap/decap etc. sFlow extended structures.

Some of these options are encountered fairly frequently; others, not so much.  As you note, they have different 
applications.

Also optical interface metrics, dropped packet notifications, and more:

Dropped traffic is pretty much universally supported and utilized, in my experience.  Other options, again, not very 
often.

Some flow telemetry implementations support packet export, to one degree or another; and, of course, there’s PSAMP, 
which utilizes IPFIX as its transport.  AFAIK, these aren’t observed very often in production, to date.

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Roland Dobbins <roland.dobbins () netscout com<mailto:roland.dobbins () netscout com>>