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4. Configuration
4.1. Initial Configuration
LARA’s communication interfaces are all based on TCP/IP. LARA comes pre-configured with the
IP configuration listed in Table
4.1 .
Table 4.1.: Initial IP configuration
Parameter Value
DHCP active
IP-Address 192.168.1.22
Net-mask 255.255.255.0
Default-Gateway None
In case this initial configuration doesn’t meet your requirements there is an initial IP configuration
necessary in order to access LARA for the first time. This chapter describes different possibilities
to accomplish that.
4.1.1. Initial configuration via DHCP server
By default, LARA will try to contact a DHCP server in the subnet to which it is physically
connected. If a DHCP server is found it may provide a valid IP address, gateway address and net
mask. Before you connect the LARA to your local subnet be sure to complete the corresponding
configuration of your DHCP server. It is recommended to configure a fixed IP assignment to the
MAC address of LARA. You can find the MAC address of your LARA on the outside of the shipping
box and labeled on LARA’s bottom side. If the DHCP connection fails on boot up, LARA will
boot with the last known IP configuration. This is the pre-configured IP address in case LARA is
booting up for the very first time.
4.1.2. Initial configuration via local console
There are two ways for getting access to LARA’s local console and carrying out the IP configuration
there:
1. Using a serial terminal: LARA has a serial line interface at its rear side (refer to Section 3.2
on page 10 ). The connector is compliant to RS 232 serial line standard. Peppercon is offering
an according serial cable that can be used for connecting the connector of LARA with a
Sub-D 9 connector of a terminal or the serial line interface of a computer running a terminal
program. The serial line has to be configured with the parameters given in
4.2 .
2. Use a crossover Ethernet cable to connect LARA to your configuring computer back-to-back
and use the initial configuration to connect.