Preparing The Sntp Coordination - Hirschmann MACH 4000 User Manual

Synchronizing the system time in the

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.
GPS
NTP-
Server
149.218.112.0
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.
Basic - L3P
Release 4.0 11/07
Switch
Client Server Client
149.218.112.1 149.218.112.2
PLC
Switch Switch
Server Client
149.218.112.3
7.2 SNTP
Client
Client
Server
5