NTP
What is NTP?
Network Time Protocol (NTP) is an Internet protocol used to synchronize computer clocks to the agreed upon standard of Coordinated Universal Time (UTC).
How does NTP work at the University of Kansas?
KU uses 2 Stratum 2 NTP time servers (time1.ku.edu, and time2.ku.edu). These servers provide the time service for the University of Kansas.
How accurate is KU’s NTP service?
Internal Oscillator
- TCXO: 1x10-10 typical 24-hour average locked to GPS/24-hour holdover (output dependent) unlocked
- OCXO: 1x10–11 typical 24-hour average locked to GPS, 2 x 10–9 per week typical aging/30-day holdover (output dependent) unlocked
- Rubidium: 1x10–12 typical 24-hour average locked to GPS, 1 x 10–11 per month typical aging/2-year holdover (output dependent) unlocked
Ethernet NTP: Output jitter within ±50 microseconds relative to UTC typical
What NTP versions are supported?
NTP v2, v3, v4
KU’s NTP servers automatically adjust for Daylight savings time and Leap Second occurrence.
Why is the NTP service being moved?
The distribution of time across the University campus being redesigned for greater reliability. The primary time servers on campus are being replaced at this time due to their age.
Sample Configurations:
Where can I get more information about NTP?
More information about NTP can be found at these websites:
Need help?
Campus technical Liaisons: If you need assistance in configuring your Solaris and Linux devices to use KU's Network Time service, see the Sample Configurations section of this page for examples.
There are many experienced users of the NTP service on campus. If you have any questions about how to use NTP in your environment, please send a message to TLTALK-L@ku.edu for assistance from the KU technical community.
If you are not a campus technical liaison and have any questions about using NTP at the University of Kansas, please contact the IT Customer Service Center at 864-8080 or email itcsc@ku.edu.
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