ProSoft Technology RLXIC-EH User Manual page 54

RLXIC-EH ♦ Intelligent Cellular
RadioLinx Intelligent Cellular Ethernet Gateway for HSUPA (3G GSM) Networks
7.4.1 Public and Private Mode
In Public Mode, the RLXIC-EH will pass the IP address assigned by the cellular
network to the device connected to its port. Public Mode is the default mode for
the RLXIC-EH.
If you need more control over which gateway address, device address, and
netmask that is given out by the internal DHCP server, you can use the private
host mode, *HOSTPRIVMODE, and set the internal network IP addresses. The
RLXIC-EH will use NAT to forward packets to the end device.
Tip: When using Public mode, ProSoft Technology recommends connecting the modem directly to
the computer or other end device. Using a hub or switch may prevent the RLXIC-EH from updating
the IP address of the end device when an IP address is received from the cellular network.
In AceManager, the Private mode settings are part of the PPP/Ethernet group.
*HOSTPRIVMODE - Set to 1 to enable the explicit IP addresses.
*HOSTPRIVIP - Set to the IP address you want the RLXIC-EH to give to your
device.
DHCP network Mask - The subnet mask that is passed to the DHCP client
on the Host device.
*HOSTPEERIP - Set to the IP address you want for the RLXIC-EH.
*HOSTNETMASK - Set to the subnetmask, generally 255.255.255.0.
Tip: If you are using Private Mode (*HOSTPRIVMODE=1), you will need to make sure that
*HOSTPRIVIP and *HOSTPEERIP are on the same subnet. If the subnet mask is 255.255.255.0, it
is safe to use 192.168.x.y for each as long as the x is the same number (0 in the example screen
shot above), and the y is different (1 and 2 in the example), and between 0 and 254.
Note: Regardless if the RLXIC-EH is configured for Public Mode or Private Mode, the same IP
address will be given to all devices connected to any of the ports. While you can connect with each
to the cellular network and the Internet, you cannot use the RLXIC-EH as a hub or router to
communicate between them.
Internal DHCP Server
DHCP (Dynamic Host Configuration Protocol) has become a primary component
of today's network environments. DHCP allows one server to automatically and
dynamically allocate network IP addresses, and other network related settings
(such as subnet masks, routers, etc.) to each computer or device without the
need to set up each specifically or keep track of what addresses have already
been used.
Page 54 of 111
Data Communication and Host Modes
User Manual
ProSoft Technology, Inc.
May 29, 2009