Rabbit EM1500, Product Manual, Page: 24 / 120

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Assigning an IP Address to the EM1500
3.2.1 Directed Ping
To use this method you must already have an IP address and the MAC address of the EM1500. The IP
address has presumably been assigned by your network administrator.
The MAC address is assigned at the factory. The first six digits are
00:90:C2
. The first six digits are the
same for every network device manufactured by Rabbit. The last six digits of the EM1500’s MAC address
are printed on a label affixed to the front panel of the unit. The six digits are identified by “MAC ID:”
The EM1500 must be on the same LAN as the host machine from which you issue the following ARP and
ping commands. From a DOS box or command prompt, type:
arp -s xxx.xxx.xxx.xxx yy-yy-yy-yy-yy-yy
substituting your IP address for the xx.xx... and your MAC address for yy-yy... This sets up the next com-
mand, which is:
ping xxx.xxx.xxx.xxx
This is the command that actually assigns the given IP address to the unit. Directed ping may only be used
once, or not at all if the IP address was set through the stand-alone configuration program.
3.2.2 Stand-Alone Configuration Program
The stand-alone program comes in two versions, one for x86-based Linux (
emconf
) and one for Win-
dows (
emconf.exe
). You will find the stand-alone program on the CD that comes with the EM1500
Tool Kit. Unlike directed ping, this method does not require you to know an IP and MAC address.
The stand-alone program allows multiple units to be configured at the same time. All EM1500s that are on
the same LAN as the host running the stand-alone program (and have not been “secured” by another host)
will respond to the special broadcast packet that is sent out. The MAC address will be displayed for every
unit that is discovered. See
Figure 5.1 for an illustration of what this looks like onscreen. The figure shows
that one EM1500 was discovered.
By default, the EM1500 is a DHCP client. This means that it will accept a dynamically assigned IP address
if one is available. You may assign a static IP address by going to the Network tab of the stand-alone pro-
gram and entering it into the IP address field. If the unit will be deployed in an environment that has a
DHCP server, be sure to uncheck Use DHCP in the Network dialog unless you want the static IP address
to be a fallback for DHCP. Save the changes by pressing <Ctrl+S> or by selecting
Save changes from
the Edit menu.
The EM1500 needs to know more than its IP address. The rest of the configuration parameters may be set
using the stand-alone configuration program,
emconf
. Each parameter will be explained fully in the next
chapter.