Setting Up a Session for APPC/MVS

Sessions determine where a conversation can flow and the way it flows. An installation can set up an initial session to establish defaults for APPC/MVS sessions, or it can set up specific sessions with unique logon modes, session limits, and contention requirements.

To set up an initial session that accesses the SNA network and establishes defaults:

1. Define a local LU to APPC/MVS
2. Define an APPC logon mode in the VTAM® logon mode table, if you want to define session characteristics other than those for the VTAM default mode
3. Define the local LU to VTAM with an APPL definition statement that also names the logon mode table containing the APPC logon mode
4. Define a partner LU on the same z/OS system or on a peer system
5. Provide the logon mode name to applications that specify it on the Allocate call, if you define an APPC logon mode instead of using the VTAM default mode.

Each of these steps is described in more detail in this section. For information about setting up specific sessions with unique characteristics, see Customizing Sessions for APPC/MVS.