Application Example - Hirschmann MS30, Power MICE, MACH 4000, OCTOPUS User Manual

Synchronizing the System Time of the

Application example:

U
The requirements made to network time accuracy are rather high, how-
ever the terminal devices exclusively support SNMP
Switch
PTP
Operation
Clock Mode
Preferred Master
SNTP
Function
Anycast destination address
Server VLAN ID
Anycast send interval
Client External Server Address 149.218.112.0
Server request interval
Accept SNTP Broadcasts
Tab. 7: Settings for the Example
In the example above, the left switch receives as the SNTP client the
system time from the NTP server using SNTP. The switch assigns to a
time received from an NTP server the stratum clock number "2". Thus,
the left switch becomes the reference clock for PTP synchronization.
PTP is active in all three switches, ensuring that, relative to each other,
the system times of the switches are synchronized precisely. As the con-
nectable terminal devices in the example exclusively support SNTP, all
three switches serve as SNTP servers.
100
149.218.112.1 149.218.112.2
On On
ptp-mode- ptp-mode-
boundary-clock boundary-clock
false false
On On
224.0.1.1 224.0.1.1
1 1
30 30
0.0.0.0
any any
no no
Layer 2 Enhanced with Layer 2 Professional
7.4 Interaction PTP and SNTP
(see Fig.
149.218.112.3
On
ptp-mode-
boundary-clock
false
On
224.0.1.1
1
30
0.0.0.0
any
no
32)..
Release 1.0 10/05