Hirschmann RS20 User Manual

Synchronizing the System Time in the
Network
118
7.4 Interaction of PTP and SNTP
Basic Configuration
Release 6.0 07/2010
In the example, the left device, as an SNTP client, gets the time from the
NTP server via SNTP. The device assigns PTP clock stratum 2 (PTPv1)
or clock class 6 (PTPv2) to the time received from an NTP server. Thus
the left device becomes the reference clock for the PTP synchronization.
PTP is active for all 3 devices, thus enabling precise time synchronization
between them. As the connectable terminal devices in the example only
support SNTP, all 3 devices act as SNTP servers.
Device 149.218.112.1 149.218.112.2 149.218.112.3
PTP
Operation on on on
Clock Mode v1-boundary-clock v1-boundary-clock v1-boundary-clock
Preferred Master false false false
SNTP
Operation on on on
Client Status on off off
External server address 149.218.112.0 0.0.0.0 0.0.0.0
Server request interval any any any
Accept SNTP Broadcasts No No No
Server status on on on
Anycast destination address 224.0.1.1 224.0.1.1 224.0.1.1
VLAN ID 1 1 1
Anycast send interval 30 30 30
Table 10: Settings for the example

Hirschmann RS20 Specifications

General

Mounting	DIN Rail
Operating Temperature	-40°C to +70°C
Protection Class	IP30
Switching Technology	Store-and-Forward
Product Type	Industrial Ethernet Switch
Port Details	10/100 Mbps Ethernet ports
Switching Capacity	3.2 Gbps
MAC Address Table	8k
Management	Web, SNMP
Redundancy	MRP
Ports	8 or 16