Synchronizing the System Time of the
116
7.3
Precison Time Protocol
Basic - L3P
Release
3.1
06/07
U Application example:
PTP is used to synchronize the time in the network. As an SNTP client,
the left Switch gets the time from the NTP server via SNTP. The Switch
assigns clock stratum “2” to the time received from an NTP server. Thus
the left Switch becomes the reference clock for the PTP synchronization
and is the “preferred master”. The “preferred master” forwards the exact
time signal via its connections to the RT module. The Switch with RT
module receives the exact time signal at a connection of its RT module
and thus has the clock mode “ptp-mode-boundary-clock”. The Switches
without an RT module have the clock mode “ptp-mode-simple-ptp”.
Fig. 31: PTP Global dialog
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