Ntp- Config - Microsemi SyncServer S200 User Manual

Web Interface
the value remains at 0, or decreases to 0, the association is becoming unreachable. The
reach value stays 0 if the SyncServer is a broadcast or multicast server.
Delay: The total delay, in seconds, of the round trip to the remote end of the NTP association.
For example, a value of "0.07817" equals approximately 78 milliseconds. The Delay for the
Hardware Clock is "0". For most NTP associations, typical values range from tens to hun-
dreds of milliseconds. The NTP daemon's clock selection algorithm gives preference to
lower Delay values.
Offset: The time offset between the SyncServer and the remote server, in seconds, of the last
poll. The NTP daemon's clock selection algorithm gives preference to lower Offset values.
The Offset for the Hardware Clock is usually in the microsecond range. For external NTP
associations, the offset is affected by the time base of the remote node and the char-
acteristics of the network path, with values typically in the 1 - 10 millisecond range.
Disp: Dispersion represents the maximum error of the SyncServer relative to the NTP asso-
ciation. There are two components in dispersion, those determined by the peer relative to the
primary reference source of standard time and those measured by the SyncServer relative
to the peer. They provide not only precision measurements of offset and delay, but also defin-
itive maximum error bounds, so that the SyncServer can determine not only the time, but the
quality of the time as well.

NTP- Config

Use this page to create, edit, or delete NTP associations.
Also see Configuring NTP (see
page 109) for more information.
Current NTP Associations
To edit or delete an association, select it using the checkbox and then click the EDIT or
DELETE button below. If the user selects EDIT, the details for that association are displayed
under Add/Edit NTP Association for the user to edit. Use the SAVE button to save the
changes and the RESTART button to make any changes take effect.
The list of Current NTP Associations always includes the Hardware Clock, which:
Cannot be deleted or edited.
n
Is configured as a preferred server ("server 127.127.45.0 prefer # pseudoaddress for the
n
timing engine" in ntp.conf).
Is displayed at the top of the list.
n
Additionally, the factory default configuration includes three Stratum 1 NTP servers operated
by Microsemi on the Internet.
The user should consider adding NTP servers available on the local network to the list of Cur-
rent NTP Associations.
Add/Edit NTP Association
Use Add/Edit NTP Association to edit existing associations or to add new ones. The Syn-
cServer can have multiple associations, each with a different Role.
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"Adding NTP Servers to the NTP Associations List" on