Logon mode parameters

If you have an application program that acts as the secondary end of the session, you might need to create new entries or supplementary tables, as follows:

If the application program is the secondary logical unit, you might want to specify session protocols. You can direct VTAM® to the proper session parameters by specifying the logon mode table entry (through the DLOGMOD operand) and the logon mode table (through the MODETAB operand) on the APPL definition statement of the program.
If the application program is intended to be in session with specific devices or application programs and it requires certain protocols, you might have to create new logon mode table entries associated with the devices.

Both an APPN Class of Service and a subarea Class of Service, specified in the logon mode entry, can be associated with each session. The APPN Class of Service determines the route that is used for APPN links, and the subarea Class of Service determines the virtual route that is used for a session. Therefore, you should understand the Class of Service requirements for your application programs. Considerations such as the importance of the function provided by the application program, the nature of the data exchanged with the logical units, and the expected response times contribute to determining the Class of Service needed for sessions with the application program. The Class of Service names must then be specified in the logon mode table entries used for LU-LU sessions. For more information about logon mode entries, see Selecting session parameters for the logon mode table.