288 Rockwell Automation Publication 1766-UM001O-EN-P - September 2021
Appendix G          Connect to Networks via Ethernet Interface
• The BOOTP server sends a message back to the processor with the IP 
address and other network information that corresponds to the 
hardware address it received.
With all hardware and IP addresses in one location, you can easily change 
IP addresses in the BOOTP configuration file if your network needs to be 
changed.
The BOOTP request can be disabled by clearing the BOOTP Enable parameter 
in the channel configuration file. When both BOOTP Enable and DHCP are 
cleared (disabled), the MicroLogix 1400 uses the existing channel 
configuration data.
Using the Rockwell Automation BOOTP/DHCP Utility
The Rockwell Automation BOOTP/DHCP server utility is a standalone 
program that incorporates the functionality of standard BOOTP software with 
a user-friendly graphical interface. It is located in the Utils directory on the 
RSLogix 500/RSLogix Micro installation CD.
The newest version of the utility can be downloaded from the Product 
Compatibility and Download Center at rok.auto/pcdc
. The device must have 
BOOTP enabled (factory default) or DHCP enabled to use the utility.
To configure your device using the BOOTP utility, perform the following steps.
1. Run the BOOTP/DHCP server utility software. It will ask you to configure 
your network settings before using the BOOTP/DHCP server tool. Enter 
your Ethernet settings for Subnet Mask and Gateway. If you are not sure 
about it, get a help from your system administrator. Just leave Primary 
DNS, Secondary DNS, and Domain Name (If corresponding information 
is allocated to the PC where BOOTP/DHCP server utility is installed, 
enter the same information.)
IMPORTANT If BOOTP is disabled, or no BOOTP server exists on the network, you must 
use RSLogix 500/RSLogix Micro programming software to enter/change the 
IP address for each processor or you must use DHCP instead of it.