Standalone VGA Grid User Guide
Configure synchronized time (NTP, PTP v1 and RDATE)
Table 14
Synchronized Time Options
Label
Description/Options
NTP
Network Time Protocol (NTP) is used for clock synchronization over the internet.
There are many publicly available NTP servers you can use, or your company may
have its own NTP server. For more information about NTP and to find
NTP servers, refer to
http://support.ntp.org/bin/view/Servers/WebHome
.
RDATE
RDATE is a tool for querying the current time from the network. It is generally
considered obsolete and has been replaced by NTP. It's offered here for
backwards compatibility with older timekeeping systems.
PTP v1
The Precision Time Protocol (PTP) is used for clock synchronization over the
internet. It has clock accuracy in the sub-microsecond range, making it more
granular than NTP.
6. Tailor the synchronization protocol with the required parameters as described below.
7. If
NTP
is selected:
a. Enter the IP address or server name for the NTP server in the
Server IP Address
field.
NTP uses UDP packets and port 123. If the system is behind a firewall and accessing an
external NTP server, UDP packets must be permitted on port 123.
8. If
RDATE
is selected:
a. Enter the IP address or server name for the RDATE server in the
Server IP Address
field.
b. Select an update interval from the drop down box.
9. If
PTP v1
is selected:
a. Select the multicast address of PTP v1 server from the
PTP domain
drop-down.
PTP Domain
Description
Default
PTP at multicast address 224.0.1.129
Alternative 1
PTP at multicast address 224.0.1.130
Alternative 2
PTP at multicast address 224.0.1.131
Alternative 3
PTP at multicast address 224.0.1.132
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