Synchronizing the system time in the
Basic - L3P
Release
4.0
11/07
7.2
SNTP
5
7.2.2 Preparing the SNTP coordination
To get an overview of how the time is passed on, draw a network plan with
all the devices participating in PTP. When planning, bear in mind that the
accuracy of the time depends on the signal runtime.
Figure 26: Example of SNTP cascade
Enable the SNTP function on all devices whose time you want to set using
SNTP.
The server responds to Unicast queries once it is switched on.
If no reference clock is available, you specify a Switch as the reference
clock and set its system time as accurately as possible.
Note: For the most accurate system time distribution possible, avoid having
network components (routers, Switches, hubs) which do not support SNTP
in the signal path between the SNTP server and the SNTP client.
GPS
NTP-
Server
ServerClient
Client
Client
Switch
PLC
ServerClient
Switch
ServerClient
Switch
149.218.112.1 149.218.112.2 149.218.112.3
149.218.112.0
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