Meinberg NTP-SLAVE-CLOCK, Инструкция по эксплуатации

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4 Initial Start of Operation
4.1 Power Supply
The local area network must support IEEE 802.3af Power over Ethernet (PoE) in order for the LAN-PoE Converter
to operate.
After network connection has been established and the LANPOE Converter has successfully synchronized, the
unit generate the time of the reached NTP server, the congured time zone is taken into consideration. This is
indicated by the yellow LED which starts blinking exactly once per second, corresponding to the time marks from
DCF77.
4.2 Network Configuration
To identify the LANPOE Converter in the network it is neccessary to set the unique 32 bit TCP/IP address by the
network administrator. Now conguration is possible by using a Telnet connection via ethernet. Initialization of
the TCP/IP address for the rst time may occur by two dierent ways: the network parameters are either given
automatically by a DHCP server or set manually by the below described ARP method.
4.2.1 DHCP
If there is a DHCP server (Dynamic Host Conguration Protocol) installed in the network the described congu-
ration can be done very easy as follows: When the TCP/IP address is 000.000.000.000 (factory default) a DHCP
client is started automatically. This client took the corresponding network parameters from a DHCP server and
congures the network installation of LANPOE Converter itself. The default hostname of the LANPOE Converter
is Cxxxxxx, where xxxxxx is the last 6 digits of the MAC address. The MAC address of the internal netcard
(Hw-Addr) is labeled beside the RJ45 connector.
4.2.2 ARP Method
This method is available under UNIX and Windows based systems. LANPOE Converter will set its address from
the rst directed TCP/IP packet it receives.
1. Step
On a UNIX host, create an entry in the host's ARP table using the intended IP address and the hardware address
of the Device Server, which is found on the label beside the RJ45 connector in the front panel.
In order for the ARP command to work on Windows, the ARP table on the PC must have at least one IP
address dened other than its own. If the ARP table is empty, the command will return an error message. Type
"arp -a" at the DOS command prompt to verify that there is at least one entry in the ARP table.
If the local machine is the only entry, ping another IP address on your network to build a new entry in the
ARP table; the IP address must be a host other than the machine on which you are working. Once there is at
least one additional entry in the ARP table, use the following command to ARP an IP address to the LANPOE
Converter:
ARP on Windows:
arp -s 191.12.3.77 00-20-4A-xx-xx-xx
ARP on Unix:
arp -s 191.12.3.77 00:20:4A:xx:xx:xx
NTP-SLAVE-CLOCK Date: 2nd July 2015 9