Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual - Manual (Page 78)

78 Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Chapter 4 Configure the EtherNet/IP Network
Determine Use of IP Address Swapping
Depending on your EtherNet/IP network configuration, you can choose to use
IP address swapping between your partnered EtherNet/IP communication
modules in the event of a switchover.
If you are using different subnets, you are responsible for programming your
system to use the address and subnet of the new primary chassis in the event of a
switchover.
Use IP Address Swapping
If you use IP address swapping, assign the same values for these configuration
parameters on both EtherNet/IP communication modules in the partnered set:
• IP address
• Subnet mask
• Gateway address
This graphic shows a partnered set of EtherNet/IP communication modules
during initial configuration.
Figure 17 - EtherNet/IP Communication Modules’ IP Addresses During System Configuration
If your partnered EtherNet/IP communication modules are on
the
Then
Same subnet use IP address swapping
Different subnets do not use IP address swapping
CH2 CH1 OK CH2 CH1 OK
Primary chassis Secondary Chassis
Assigned IP Address: 192.168.1.3