Hirschmann RS20 User Manual page 111

Synchronizing the System Time in the
Network
Note: Connect all the connections you need to distribute the PTP information
to connections with an integrated time stamp unit (RT modules).
Devices without a time stamp unit take the information from the PTP and use
it to set their clocks. They are not involved in the protocol.
Enable the PTP function on all devices whose time you want to
synchronize using PTP.
Select the PTP version and the PTP mode. Select the same PTP version
for all the devices that you want to synchronize.
PTP mode
v1-simple-mode
v1-boundary-clock
v2-boundary-clock-onestep Boundary Clock function based on IEEE 1588-2008 (PTPv2) for
v2-boundary-clock-twostep Boundary Clock function based on IEEE 1588-2008 (PTPv2) for
v2-simple-mode
v2-transparent-clock
Table 8: Selecting a PTP mode
If no reference clock is available, you specify a device as the reference
clock and set its system time as accurately as possible.
Basic Configuration
Release 6.0 07/2010
Application
Support for PTPv1 without special hardware. The device
synchronizes itself with received PTPv1 messages.
Select this mode for devices without a timestamp unit
(RT module).
Boundary Clock function based on IEEE 1588-2002 (PTPv1).
devices with MM23 and MM33 media modules.
The one-step mode determines the precise PTP time with one
message.
devices with RT modules.
The two-step mode determines the precise PTP time with
two messages.
Support for PTPv2 without special hardware. The device
synchronizes itself with received PTPv2 messages.
Select this mode for devices without a timestamp unit
(RT module).
Transparent Clock (one-step) function based on IEEE 1588-2008
(PTPv2) for devices with MM23 and MM33 media modules.
7.3 Precision Time Protocol
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