Add and Configure the Entries in an IP Routing Table

You use a SCADAPack x70 IP Routing Table to specify the IP routing that a particular SCADAPack x70 device is to use in order to connect to a commercial TCP/IP network. You use the table to specify the packet forwarding and IP gateway services that are required to enable such functionality. You can specify up to 20 static IP routes per IP Routing Table.

Where TCP/IP packets are routed through the SCADAPack x70 device, IP routes may or may not be needed depending on the Disable IP Forwarding configuration (see Enable or Disable IP Forwarding):

• Where IP Forwarding is enabled, there is no need to include an IP Routing Table entry for IP addresses that are on the same local subnet as a SCADAPack x70 device interface. Data packets will be automatically forwarded to those addresses.
• Where IP Forwarding is disabled, IP routes are required for communication between SCADAPack x70 device interfaces, even if the IP address for a device is on the same local subnet as a SCADAPack x70 interface.

Where the SCADAPack x70 device is directly communicating using an IP address in the same local subnet as one of its interfaces, an IP route is not required, regardless of the Disable IP Forwarding configuration.

Where IP route entries are added with overlapping subnets, the IP route entry with the narrowest subnet is the entry used to route the data packet. This establishes a selection priority among multiple IP routes. Where multiple routes could be applied to the same IP address, the route to be used is chosen in the following order:

1. Host route (subnet mask 255.255.255.255).
2. Narrowest subnet Network route (for example, subnet mask 255.255.255.252).
3. Gateway route (where a gateway IP is configured on the route).

WARNING

communication loss

Omission of IP routes that are used by Geo SCADA Expert can lead to loss of communication between Geo SCADA Expert and your SCADAPack x70 device. Similarly, omission of IP routes that are used by other devices with which the SCADAPack x70 device is expected to communicate can lead to loss of communication between the SCADAPack x70 device and those devices.

Verify that the required IP routes are included in the IP Routing Table and that the specified settings are valid for the device and your network.

Failure to follow these instructions can result in death or serious injury.

In the Geo SCADA Expert database, the table is built into the SCADAPack x70 Device Configuration item to which it relates. Changes made to the routing configuration are downloaded to the SCADAPack x70 device when that device's Download Configuration pick action is next executed.

You specify these properties for each route in a SCADAPack x70 IP Routing Table:

To add an entry to an IP Routing Table:

1. Display the Table for the relevant SCADAPack x70 Device Configuration item.
2. Select the IP Routing Table tab to display the IP Routing Table.
3. Select the Add IP Route button.
   The Add IP Route Entry dialog box is displayed.

   

4. Populate the fields as required (see above).

   The fields that are highlighted indicate those that need populating with a value that has to take a specific format, as opposed to fields to which a default value is already assigned. The highlighting is removed once the field is populated with a value that has the required format.

5. Select the OK button to close the dialog box and add the entry to the table.

To edit an entry in an IP Routing Table:

1. Display the Table for the relevant SCADAPack x70 Device Configuration item.
2. Select the IP Routing Table tab to display the IP Routing Table.
3. Either:
   • Double-click on the entry that you want to edit.

   Or:

   1. Click on the route that you want to edit.
   2. Select the Edit IP Route button.

   The Edit IP Route Entry dialog box is displayed.

    

   

4. Change the route's configuration as required.
5. Select the OK button to confirm the changes, close the dialog box, and update the Routing Table.

To delete an obsolete route from an IP Routing Table:

1. Display the Table for the relevant SCADAPack x70 Device Configuration item.
2. Select the IP Routing Table tab to display the IP Routing Table.
3. Select the entry for the route that is no longer required.
4. Select the Remove IP Route button. (The button is only available for use when an entry is selected in the table.)
   The route that was highlighted is removed from the table.

To sort the entries that are displayed in an IP Routing Table:

• Click on the column heading by which you want to sort the entries in the table. (To reverse the sorting order, click on the same column heading again.) The order in which the entries are sorted does not impact on the routing functionality.

  When you redisplay the table, the entries are listed in the order in which they were added to the table.