Synchronizing the system time in the
Basic - L3P
Release
4.0
11/07
7.4
Interaction of PTP and SNTP
19
In the example, the left Switch, as an SNTP client, 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. PTP is active for all three Switch, thus
providing precise time synchronization between them. As the connectable
terminal devices in the example only support SNTP, all three Switches act
as SNTP servers.
Switch 149.218.112.1 149.218.112.2 149.218.112.3
PTP
Operation on on on
Clock Mode ptp-mode-
boundary-clock
ptp-mode-
boundary-clock
ptp-mode-
boundary-clock
Preferred Master false false false
SNTP
Operation on on on
Server destination address 224.0.1.1 224.0.1.1 224.0.1.1
Server VLAN ID 1 1 1
Send interval 30 30 30
Client external server address 149.218.112.0 0.0.0.0 0.0.0.0
Request interval any any any
Accept broadcasts no no no
Table 9: Settings for the example
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