Communications requirements for DDM in an APPC network

Each IBM i product in a distributed data management (DDM) network must meet these communications requirements.

APPC/APPN support or the IBM i Access Family licensed program must be installed and configured on the system.
At least one Systems Network Architecture (SNA) communications line must use synchronous data link communications (SDLC), token-ring network, Ethernet, or X.25 protocol.

The number of sessions that can be used for DDM conversations is not limited by DDM. The maximum is determined in the same manner as for any other APPC-related communications. For parallel sessions, the session maximum is specified in the mode. For single session devices, the session maximum is always one.