IBM Tivoli and Cisco - Manual (Page 248)

230 Building a Network Access Control Solution with IBM Tivoli and Cisco Systems
It is possible to group the NADs into Network Device Groups (NDGs) for location
or service-based filtering. To do this, the use of NDGs must first be enabled:
1. Click Interface Configuration from the main menu (Figure 7-13).
Figure 7-13 Interface Configuration screen for the creation of NDGs