Rockwell Automation Publication 1769-UM021G-EN-P - October 2015 85
Complete Software Tasks Required at CompactLogix 5370 Controller Installation Chapter 4
Using DHCP Software
Dynamic Host Configuration Protocol (DHCP) software automatically assigns
IP addresses to client stations logging on to a TCP/IP network. DHCP is based
on BOOTP and maintains some backward compatibility. The main difference is
that BOOTP allows for manual configuration (static), while DHCP allows for
both static and dynamic allocation of network addresses and configurations to
newly attached modules.
Be cautious when using DHCP software to configure a module. A BOOTP
client, such as the EtherNet/IP communication modules, can start from a DHCP
server only if the DHCP server is written to handle BOOTP queries. This
requirement is specific to the DHCP software package used. Consult your
system administrator to see if a DHCP package supports BOOTP commands
and manual IP allocation.
ATTENTION: The EtherNet/IP communication 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.
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