[time-nuts] Re: Using NTP Server Time To Measure WAN Performance

[Keenan Tims]

I have used irtt[1] to make similar measurements. Even with
'semi-precision' (NTP) time sync, the one-way delay estimates and one-way
loss measurements are quite useful to pin down issues. However it has been
designed with precision timing in mind, so with PTP or stratum 1 time sync,
it will enable accurate one-way delay and jitter measurement as well.

There is no API, but the command-line client can output JSON which makes it
pretty easy to integrate into other tooling.

[1] https://github.com/heistp/irtt


On Wed, 22 Mar 2023 at 15:05, Fleeson, Richard via time-nuts <
time-nuts at lists.febo.com> wrote:

> Time Nuts
>
> I have a question about using NTP servers to measure network performance.
> I have a MPLS Wide Area Network with GPS locked NTP servers at each
> location.  I need to measure the network packet delay as well as packet
> jitter.  Looking on the NIST website I found this document via a trail of
> external web links:
>
> 40th Annual Precise and Time Interval (PTTI) Meeting
> Studying Network Timing With Precision Packet Delay Measurements
> https://apps.dtic.mil/sti/pdfs/ADA503429.pdf
>
> Can anyone recommend a low cost or freeware way to measure packet delay
> and packet jitter using NTP associations or IEEE-1588?  Don't care if it is
> Linux or Windows OS.
>
> Thanks,
> Richard
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