Synchronizing the system time in the
16
7.3
Precision Time Protocol
Basic - L3P
Release
4.0
11/07
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 mod-
ule receives the exact time signal at a connection of its RT module and
thus has the clock mode "ptp-mode-boundary-clock". The Switches with-
out an RT module have the clock mode "ptp-mode-simple-ptp".
Figure 31: PTP Global dialog
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