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11 NTP clock operation
Clocks support IPv4 and IPv6 protocols. You can disable individual protocols by setting
parameter
P18.
The default clock setting allows both protocols at the same time (P18: 0).
For IPv4 mode, DHCPv4 is enabled by default (option P19: 3).
IPv6 mode allows up to 4 different priority IP addresses in downward order:
•
DHCPv6
•
manually configured IP address (fix)
•
autoconfiguration. (SLAAC / RA)
•
local address link
By setting parameter
P25
, you can disable DHCPv6 and/or auto-configuration (SLAAC).
For IPv6 mode, DHCPv6 and autoconfiguration (SLAAC) are enabled by default (P25: 3).
Calculate of Link Local Address:
fe80 :: 2 [2. octet MAC]: [3. octet MAC] ff: fe [4. octet MAC]: [5. octet MAC] [6. octet MAC]
Example: MAC:
00: 16:91 : 12:34:56
IPv6:
fe80 ::216:91ff: fe12:3456
11.1 Unicast mode
The clock is synchronized to UTC (Universal Time Coordinated) from a NTP
server (up to four
IPv4/IPv6 addresses
for NTP server IP addresses
configurable) and must have assigned its own
IPv4/IPv6
address.The clock
requests in defined intervals the actual time from the NTP server. If the server is
not available, the clock tries to contact the other defined servers in cyclic way
until the valid response from the NTP server is received.
This operating mode supports the monitoring and configuration of the movement
via the network connection by means of the Telnet, SNMP or the MOBA-NMS
software tool. For supervision and configuration with MOBA-NMS the clock’s
IPv4/IPv6
address can be used or the multicast group address having last octet
cleared to zero (presuming the multicast is not disabled).
It is necessary to set apropriate time-zone for correct displaying of local time and
date – see the chapter 9 for details.
Default network parameters:
IP mode
IPv4 / IPv6
IPv4-Adresse
0.0.0.0
IPv4 Subnetzmaske
0.0.0.0
IPv4 Default-Gateway
0.0.0.0
NTP-Serveradresse 1
0.0.0.0 / 0:0:0:0:0:0:0:0
NTP-Serveradresse 2
0.0.0.0 / 0:0:0:0:0:0:0:0
NTP-Serveradresse 3
0.0.0.0 / 0:0:0:0:0:0:0:0
NTP-Serveradresse 4
0.0.0.0 / 0:0:0:0:0:0:0:0
NTP-Anfragenzeit [s]
10
DNS-Server
0.0.0.0 / 0:0:0:0:0:0:0:0
