Ethernet Communications Modules, 3rd Edition, Rev. D
6-2
Chapter 6: H0/H2/H4-ECOM100 DHCP & HTML Configuration
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H0/H2/H4 -ECOM100 DHCP
DHCP Issues
The H0/H2/H4- ECOM100 is configured at the factory to look for a DHCP (Dynamic
Host Configuration Protocol) server at power up. DHCP provides a way to allocate IP address
dynamically to devices on a local area network (LAN). A system or network administrator
configures a DHCP server with a range of IP addresses that can be assigned to DHCP enabled
clients/servers (i.e. H0/H2/H4 -ECOM100).
In addition to an IP address, a DHCP server can provide other information such as DNS
domain or a gateway IP address.
DHCP uses the concept of a “lease” or amount of time that an assigned IP address will be
valid for a client. The lease time can vary depending on how long a user is likely to require the
network connection at a particular location. Since the TCP/IP configuration is “leased” to the
client, that is, it’s not a permanent configuration. This information can change from one power
up session to the next. While this is an acceptable solution for the initial testing and setup of
your H0/H2/H4 -ECOM100 device, we do not recommend that you use DHCP to assign IP
addresses for your runtime operation. Use NetEdit3.5 or the H0/H2/H4 -ECOM100’s HTML
Configuration page to assign a static IP address to the module (shown below).
NetEdit3.5 can be used to connect to a H0/H2/H4 -ECOM100 using the IPX protocol,
regardless of the IP address that was assigned to it by a DHCP server.
Disabling DHCP and Assigning a Static IP Address
You can use NetEdit3.5 or the H0/H2/H4 -ECOM100’s HTML Configuration page to disable
DHCP and assign a static IP address to the module. Click on the Use the following IP Address
button and enter a valid IP address for your network application.
NetEdit3.5 (refer to chapter 3)
HTML Configuration
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