Rockwell Automation 1756-ENET/B ControlLogix Ethernet Communication Interface Module User Manual - Manual (Page 45)

Publication 1756-UM051B-EN-P - November 2000
Configuring the Ethernet Module 4-7
Using DHCP Software to
Configure Your Module DHCP (Dynamic Host Configuration Protocol) software automatically
assigns IP addresses to client stations logging onto a TCP/IP network.
DHCP is based on BootP and maintains some backward compatibility.
The main difference is that BootP was designed for manual
configuration, while DHCP allows for dynamic allocation of network
addresses and configurations to newly attached devices.
Be cautious about using DHCP software to configure your module. A
BootP client, such as the 1756-ENET/B module, can boot from a
DHCP server only if the DHCP server is specifically written to also
handle BootP queries. This is specific to the DHCP software package
you use. Check with your system administrator to see if your DHCP
package supports BootP commands and manual IP allocation.
What’s Next? The following chapter describes an example application in which you
configure remote digital I/O using a rack optimized connection.
ATTENTION
!
The 1756-ENET/B module must be assigned a fixed
network address. The IP address of this module must
not be dynamically provided.
Failure to observe this precaution may result in
unintended machine motion or loss of process
control.