Rockwell Automation Publication 1769-UM021I-EN-P - May 2018 97
Complete Software Tasks Required at CompactLogix 5370 Controller Installation Chapter 5
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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