Re: [Bloat] Trouble Installing PPing in MacOS

[Kathleen Nichols <nichols@pollere.net>]

On 2/26/21 4:56 AM, Jason Iannone wrote:
...
> passively monitor production flows to get a novel sense of end to end
> performance per flow. I don't know of any other passive monitoring
> technique, beyond a port mirror + a whole gang of systems, that can
> provide this level of detail. Please enlighten me if I'm wrong. The only
> other passive monitoring mechanisms I'm aware of are SNMP polling,
> IPFIX/*Flow, and Streaming Telemetry Interface. None of those systems
> provide end to end flow performance details. The standard in-band active
> monitoring tools are good for determining node to node and full path
> metrics, but this provides a more complete picture of end to end
> performance beyond active y.1731/802.3ag/OAM probes. I'm a little
> surprised that I'm only learning about it now.
> 

So, I worked on something I call TSDE (Transport Segment Delay
Estimator) that lets you get a (noisy) one-way estimate of delay
variation. I did pping as sort of a side product and as a way to find
the minimum round trip delay since TSDE just gives variation. This was
done under a DOE SBIR and Pollere has a patent on it but I would
consider sharing information if someone wanted to develop an open source
tool. (I feel that my own implementation is kind of fragile as I was
using it to try different ideas for getting a good estimate. And I
haven't done anything with it for several years.)

	Kathie