Information needed for defining the major nodes that is not provided by the ISTDINFO function module is defined in templates in the ISTDEFIN command list. The templates contain information about logon modes, interpret tables, resource names, the number of logical units (SNA cluster controllers only), and other information.

Some information, such as the number of buffers VTAM® should allocate for receiving data from the NCP (provided on the MAXBFRU operand of the HOST definition statement), is not always available. You can modify the defaults in the templates to override the IBM-supplied defaults. Edit the ISTDEFIN command list, which shows you the templates with which you can modify the values in the REXX statements.