Configuring the Service/Extend Port

Introduction

The 140NOC78100 control head module includes a service/extend port that can be configured to support 3 functions:

Extended Network: If you configure the service port for an extended network, you can extend the device network by adding another distributed I/O network.
Port Mirroring: If you configure the service port for port mirroring, you can connect to this port via a PC and sniff (using Ethereal, WireShark, etc.) the traffic that is traveling through the other ports, including the internal port that is connected to the CPU.
Access Port: If you configure the service port for access, diagnostic information is provided via EtherNet/IP or Modbus explicit messaging, or via SNMP.

NOTE: In access port mode, the IP address of the port is the same as that of the control network.

The Service Port page — when configured as an Extended Network — looks like this:

The Service Port page — when configured for Port Mirroring — looks like this:

Displaying the Service Port Page

To display the Service Port page:

Step	Action
1	Click Service Port in the navigation tree, and set the Service Port Mode to one of the following: Extended Network Port Mirroring Access Port
2	Click Apply to save changes and leave the window open, or click OK to save changes and close the window.

Service Port Page Properties

The following properties can be viewed and edited in the Service Port → Extended Network page:

Property	Description
Internal Port	These ports are disabled and cannot be edited.
ETH 2
ETH 3
ETH 4

The following properties can be viewed and edited in the Service Port → Port Mirroring page:

Property	Description
Internal Port	These ports are editable: To enable these ports, click Yes in the Enabled field. To disable these ports, click No in the Enabled field. The extended network IP address and sub-network mask in the IP forwarding service are disabled.
ETH 2
ETH 3
ETH 4