The key block range for a system is specified using two components: a group number and a range number. The group number is a number between 3 and 32,767 inclusive (group numbers 1 and 2 are reserved for existing data and for application usage, so customer configurations must start with group 3). The range number is a number between 1 and 512 inclusive. Each system in the system landscape must be configured with a unique group range pair. For example, the following configuration could be used for a three system landscape:
Alternatively, the following could be used:
It must be emphasized that it is very important that no systems in the system landscape are configured with the same group range pairs. Please refer to the Key Block Range Allocation management subsection of section 5.2.2 - Data Management Policy for details of a recommended policy for managing key block range allocations.