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Configuring LAN Settings for the WebPort


When assigning IP addresses across the system, (WAN, LAN, NAT, Forwarding) DO NOT overlap with IP addresses used elsewhere. For example, setting a Static WAN address to the same forward facing address used for a NAT entry will result in you having to reset to defaults.

For an overview of the network deployment strategies you may use, see About Networking Deployments


By default, the LAN setting for the WebPort is DHCP Server. This means that the WebPort allocates all IP addresses for the devices connected to it via the LAN ports. However, when connecting a WebPort to an existing network, it is highly recommended that you keep the DHCP Client option for the WAN to start with. This allows your network's DHCP server to allocate the appropriate address(es) to the WebPort(s), and your WebPort(s) to allocate the appropriate addresses to devices that are connected only to the WebPort. The WebPort LAN is also assigned a unique Spectrum Controls MAC address that is the WAN MAC address value +1. Example: If the WAN MAC address on the WebPort label is 00:02:83:00:01:82, the LAN address is 00:02:83:00:01:83.

You may configure a WebPort using an Ethernet cable to make a direct connection between a personal computer and one of the four LAN ports on the WebPort front panel. You may use either a straight-through or crossover cable as the WebPort autosenses which cable is used.

Before you can communicate with the WebPort, the user-supplied power supply needs to be wired into the PWR terminal strip on the WebPort front panel, and plugged into an outlet in a controller cabinet or other power source. Once power is applied to the WebPort, the device starts up and initially configures itself to communicate.

After startup, the WebPort displays a LAN address in the scrolling display on the front of the WebPort.

  1. From the Configuration Work Area, select the following icon: This is a picture of the dialog.

    The Network Setup dialog appears:

    This is a picture of the dialog.
  2. View or specify the following LAN options:
    • Connection type. Identifies whether to use static or dynamic address configuration for the LAN network:
      • Static IP. Specify that the Ethernet IP address for this WebPort is static. This means that the IP address is entered manually and does not change.
      • DHCP Client. If you have a DHCP Server installed and configured on the network, select this option to allow the WebPort to get a LAN IP address for a designated lease period from the designated DHCP server when the WebPort starts up. The DHCP client IP address may change each time the lease period expires but does not usually do so.
      • DHCP Server. Recommended option. DO NOT specify this option unless you wish to allocate all IP addresses for the devices connected to the LAN port from the WebPort. This will specify that the WebPort is to function as a dynamic host configuration protocol (DHCP) server.
    • LAN IP. Enter WebPort LAN IP Address. This option is enabled only if you select Static IP or DHCP Server addressing.
    • Subnet Mask. Enter subnet mask address. This value is typically This option is enabled only if you select Static IP or DHCP Server addressing.
    • IP Range. Lists the range of IP addresses (from a specific starting address to a specific ending address) that is available for allocation when the WebPort is functioning as a DHCP server. This option is enabled only if you select DHCP Server addressing. The first three octets must match the LAN subnet IP address for both the starting and ending values. Example: to
    • DHCP Lease Info. If you configure the LAN port as a DHCP server, you may access the DHCP Lease information for the port. Click the button provided. This shows you the lease information for the device(s), usually PLC(s), that are connected to the LAN port. This option is visible only if the WebPort is configured as a DHCP server. To view the information, click DHCP Lease Info. The following dialog appears: This is a picture of the dialog.
      • Host Name. Name of PLC.
      • IP. IP address of the PLC.
      • End Time. Time and date showing when current lease ends for PLC.
      • MAC. PLC MAC address.
    • Submit. Saves data on WebPort and exits.
    • Cancel. Exits without saving data from WebPort.