How to check NTP service ?

Hi!
Found one old thread, but didn’t help. Any ideas how to check NTP service? Meaning, which parameters need to be set in probe description along with port 123?
More thanks, Alar.

I have an NTP probe set up to test that my Cisco routers which are providing NTP reference time to the rest of my network are in sync with the external NTP reference. Not sure if this is what you are trying to achieve, but here is how my probe is set up. If the router loses sync with the external NTP source the stratum is reported as 16 and the probe shows as an error.
NTP-probe.png

Does anyone still have NTP-probe.png image? Seems not available on the forum anymore…