TCP/IP configuration

On the CompactFlash-based J-NXS-AX-FL model, any changes you make to TCP/IP configuration do not become permanent until the JACE-NXS is rebooted at the end of the Commissioning Wizard, because the OS resides on an overlay-protected partition of the CompactFlash card. Therefore, simply pulling the power plug from the JACE will result in any previously-made changes to become lost.

To configure TCP/IP settings

At the TCP/IP Configuration step (Figure 13) in the Commissioning Wizard, do the following:

Click the “Interface 1” control to review its TCP/IP settings, which include the temporary factory-shipped IP address.
Assign the JACE a unique IP address for the network you are installing it on. No other device on the network should use the same IP address. Include the appropriate subnet mask used by the LAN.

Alternatively, if the network supports DHCP, you can enable it (click DHCP Enabled). In this case, the IP Address and Subnet Mask fields become read only.

In general (for stability), static IP addressing is recommended over DHCP.Do not enable DHCP unless you are certain that the network has DHCP servers! Otherwise, the JACE may become unreachable over the network.
Review, and if needed adjust other TCP/IP settings, which (in usual order of importance) include:
- Gateway — The IP address for the device that forwards packets to other networks or subnets.
- DNS Domain Name — Type name of network domain, or if not applicable, leave blank.
- Hostname — Default is string similar to “OEM-32F5-2F37,” or enter another name you want to use for this host.
- Hosts File — Click control to expand edit field. Format is a standard TCP/IP hosts file, where each line associates a particular IP address with a known host name. Each entry should be on an individual line. The IP address should be placed in the first column, followed by the corresponding host name. The IP address and the host name should be separated by at least one space.
  1. To add a line, click at the end of the last line and press Enter.
  2. Type in the required data on the new line.
    
    To return to see all TCP/IP settings, click the control to contract the edit field when done.
Click the Next button to go to the next step.

An “Interface 2” is also available, for configuring its (separate) TCP/IP settings. By default, this port is configured for DHCP. Intended usage is for isolating a “driver’s” Ethernet traffic from the primary interface. Although DHCP is supported in the TCP/IP configuration of both ports, typically static IP addresses are used, for stability. In general, it is recommended that you check with Systems Engineering before engineering a JACE-NXS solution dependent on the secondary (Ethernet 2) port, and otherwise leave it at default values.

Figure 13. TCP/IP Configuration dialog