IRRPRMxx parmlib member
The data set name table and the database range table can be specified by using the parmlib member, IRRPRMxx.
The parmlib member, IRRPRMxx, contains data for the RACF data set name table, range table, and sysplex communications options.
If you want to specify more than one parmlib members, see Multiple parmlib members.
The ICHRRNG exit is required on the system even when using the IRRPRMxx parmlib member. This is required due to the order of processing at IPL-time and how early the ICHRRNG module must be loaded.