How NetIM Infers Links and Connections : Group-based inference
  
Group-based inference
By default, Link and Connection Inference considers all devices present in the NetIM database when it performs IP address-based inference. However, it can be configured to infer connections only between devices that are members of the same user-defined NetIM group. This is useful when you have overlapping IP address domains in your network.
When group-based inference is enabled, IP address-based inference engines perform separate link inference on each specified group. It can be configured to operate on all groups defined in NetIM, or just on specified groups.
When Group-based Inference is enabled, connections are inferred only between members of the specified group(s). No connections are inferred between groups. If you want to infer connections between devices in different groups, you must create a group that contains the connected devices and then configure Group-based Inference to include this group.