HP-UX Internet Services Administrator's Guide (August 2003)

Configuring NTP
Getting Started with NTP
Chapter 466
Synchronization: NTP secondary (stratum 2), Sun/Unix
Service Area: Sprintlink/NYSERnet
Access Policy: open access, authenticated NTP (DES/MD5) availa
ble
Contact: Seth Robertson ([e-mail])
Note: IP addresses are subject to change; please use DNS
/usr/sbin/ping ntp.ctr.columbia.edu 64 5
PING 128.59.64.60: 64 byte packets
64 bytes from 128.59.64.60: icmp_seq=0. time=83. ms
64 bytes from 128.59.64.60: icmp_seq=1. time=86. ms
64 bytes from 128.59.64.60: icmp_seq=2. time=85. ms
64 bytes from 128.59.64.60: icmp_seq=3. time=86. ms
64 bytes from 128.59.64.60: icmp_seq=4. time=83. ms
----128.59.64.60 PING Statistics----
5 packets transmitted, 5 packets received, 0% packet loss
round-trip (ms) min/avg/max = 83/84/86
In this example, the ping round-trip times are significantly greater than
in the previous example. 85 milliseconds is good for general NTP
purposes. The dispersion measurements are less than the ping
round-trip times. The NTP daemon has a watershed at 128 milliseconds,
but this example server at 85 milliseconds is comfortably below that.
You can use the server at Columbia.
/usr/sbin/ntpq -p ntp.ctr.columbia.edu