While a VBS typically has service groups across clusters, you can also have two or more service groups from a single cluster participate in a given VBS. In this case, you can choose to configure either VCS dependency or VBS dependency between these intra-cluster service groups. Symantec recommends use of VCS dependency in this case. However, based on your requirement about the type of fault policy desired, you can choose appropriately. For information about VBS fault policies, refer to the Virtual Business Service - Availability User's Guide.