Hi! Lately I've been using the two stratum 2 servers our national observatory provides to the public mainly as backup for my GPS based local NTP servers.
I've always found odd that one of them exhibited an erratic behaviour when compared to the other one. I decided to use ntpdate on one of my stratum 1 machines (Trimble AcutimeGold in position hold mode; looking at my loopstats file my clock is always within 5 us of UTC) against these 2 servers every minute for a while and plotted the results. Offset is in seconds and time is UTC. I am on a fibre asymmetrical connection 100 Mbps/25 Mbps. The offsets for the best behaved server are expected but... the other server? After gathering enough data I'll contact them as ask what is the problem with the server... Opinions? Regards, Miguel
National Observatory NTP Performance.pdf
Description: Adobe PDF document
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