9.1.5.2 External NTP Server
Via the configuration page you can enter up to 7 external NTP server as backup for the internal reference clock.
Server Address:
IP or Hostname of an external Server.
Symmetric Keys:
In this optional field, you can enter the ID of a symmetric key, which is to be used for authentication with the
external server.
The following must be considered, to make the authentication work:
a)
The NTP key file of the server must contain the ID. You can edit the key file in the submenu
"NTP
→
NTP Symmetric Keys" on the NTP page.
b)
Additionally you must enter the ID into the field "Local Trusted Keys" under "NTP
→
General Settings".
c)
The same key with the same ID must be configured on the external server.
Minpoll and Maxpoll
(not supported on devices which support the MRS feature):
With these settings, you can set the minimum and maximum polling interval (query cycle) for a given external
server. NTP starts with the minimum polling interval and changes step by step to the maximum of the polling
interval.
Use Iburst
(not supported on devices which support the MRS feature):
The iburst activation accelerates the initial synchronization with an external server.
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Date: 2nd July 2020
LANTIME CPU Expansion Shelf
