Creating a Subnet

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The Subnet feature of WhatsUp Gold allows you to create separate maps for different segments of your network, yet maintain a connection between the maps. If you already have a parent network map, you can create a second network map for a particular network segment and then link it to the parent map; this makes the second map a "subnet" of the parent map.

Note: If you have a hierarchical network that uses SNMP, subnet maps can be created automatically by using SmartScan. For more information see, "Mapping a Hierarchical Network".

WhatsUp Gold can simultaneously monitor the parent network map and any subnet maps. When a device or service goes down in a subnet map, the subnet icon on the parent map changes color to indicate that there's a problem in the subnet. The subnet icon in the parent network map will have the color of the highest priority alarm that occurs in the subnet map. For example, if a device in the subnet does not respond to four polls, the subnet icon is red.

To create a subnet map (assuming you already have a parent map):

1. Create a new map and add the devices for the subnet. You can use any of the methods for creating a network map described in the previous section. You can also copy and paste devices from an existing map.
2. Save the new map.
3. Open the parent map or, if it's already open, make it active.
4. Click the Edit Mode button to view the editing toolbars.
   
5. Click the Subnet icon and drag it where you want to create
   the subnet icon.
6. Right-click the subnet icon, select Properties, and click General.
7. In the Display Name box, enter the file name of the subnet map, not the Map Title. This must be the name of the .wup file without the file extension. For example, if the subnet map file is named SubnetA.wup, you enter SubnetA here.

Note: Some have referred to this subnet map as the "child" map, and the map that contains the subnet icon has often been referred to as the "parent" map.

8. Click Monitor, make sure Monitor This Item is selected.
9. Click OK.
10. Click the Edit Mode button to go back to monitor mode.

When you open a network map, WhatsUp Gold can also open any associated subnet maps and start monitoring them. (From the Configure menu, select Program Options->General, and then select Automatically load subnets when opening maps.)

If a subnet map window is not opened, you can right-click the subnet icon and select Load Subnet from the menu to open it.

If a subnet map is opened but is hidden behind other windows, you can right-click the subnet icon and select View Subnet to bring the subnet map to the top.

To connect a subnet map to its parent map:

1. Right-click on a blank space on the subnet map, select Properties, and click General.

2. In the Parent Map list box, select the correct parent map for this subnet map (child map).

Note: If you do not tell the subnet map (child map) who the parent map is, you will not be able to go to View, and select Parent Map (it will be grayed out), nor will you see from the right-click menu on the map the choice to select Parent Map.

3. Click OK.
4. From within a subnet map, you can open its parent map by right-clicking and selecting View parent map, or from the View menu, by selecting Parent map.

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