Configuring the IP Forwarding Service
Original instructions
About us
Introduction
The BMENOC0321 control network module includes an IP forwarding service. The IP forwarding service provides transparency between networks in a PlantStruxure system and can route packets among a maximum of three subnetworks that each has its own distinct broadcast domain.
NOTE: You cannot enable the IPsec protocol and the IP Forwarding service at the same time. (You cannot build a Control Expert project when both are enabled.)
Use the Control Expert DTM to configure the IP forwarding service by assigning unique IP address parameters (including the IP address and subnetwork mask) for the BMENOC0321 control network module to facilitate communications among these networks:
You can also identify the default gateway for the BMENOC0321 control network module. (Refer to the description of the role of the default gateway.)
NOTE: The default gateway is the IP address of the control network router. Usually this router is a device that connects the control network to other networks higher up in the Ethernet infrastructure.
Mapping BMENOC0321 Module Ports to Subnets
When the IP Forwarding service is enabled, these IP ranges are assigned to the ports on the BMENOC0321 control network module:
Port
Configured with the IP Address for the...
Typical Usage
ETH 1
Extended network
The service port can be connected to a BMENOC0301 or BMENOC0311 module that communicates with an extended DIO network when the service port is configured for Extended Network Mode.
ETH 2, ETH 3
Control network
Use one or both of these ports to connect to the control network. Each port is assigned the IP address settings input into the Control Network area.
Backplane
Device network
Use the backplane port to communicate with the CPU, and through it to modules on the RIO main ring, to modules on RIO sub-rings, and to distributed equipment on DIO sub-rings.
Displaying the IP Forwarding Service Parameters
To display the IP Forwarding page and access the parameters:
Step
Action
1
Click Services in the navigation tree in the left panel of the Device Editor.
Result: The Services page opens.
2
In the Services page, set the IP Forwarding field to Enabled. Then click Apply.
Result: The IP Forwarding service appears in the navigation tree.
3
Click IP Forwarding in the navigation tree.
4
Enter IP addressing parameters for the IP Forwarding service.
5
Click Apply to save changes and leave the window open, or click OK to save changes and close the window.