WESM zl Management and Configuration Guide WT.01.03 and greater

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Configuring the ProCurve Wireless Edge Services zl Module
Enabling Secure Network Time Protocol (NTP)
■ Root Dispersion—a 32-bit unsigned fixed-point number indicating the nom-
inal error relative to the primary reference source, in seconds with frac-
tion point between bits 15 and 16. The values that normally are displayed
in this field range from 0 to several hundred milliseconds.
■ Delay—the number of milliseconds required for NTP packets to make the
round-trip from the module to the remote server and back. The delay is
an important factor when the module selects the “best” server. Minimizing
delay is one reason why you want to pick servers that are close to you.
■ Offset—the difference in milliseconds between the clocks in your host and
the remote resource. As clocks synchronize, the offset decreases. Your
mode and the mode of the peer, as well as other factors, dictate whether
the module synchronizes to the remote resource.
■ Dispersion—A measure, in seconds, of how scattered the time offsets have
been from a given time server.
■ Precision—an eight-bit signed integer indicating the precision of the local
clock, in seconds to the nearest power of two. The values that normally
are displayed in this field range from -6 for mains-frequency clocks to -20
for microsecond clocks found in some workstations.
To refresh the screen, click the Refresh button.
To close the screen, click the Close button.
Viewing Secure NTP Status
The Special Features > Secure NTP > Secure NTP Status screen displays current
status information for the Wireless Edge Services zl Module’s NTP services.
(The NTP Associations tab shows the status for all associations with potential
time sources.)