gtpm3m13Multi-Processor Interconnect Facility Reference

Migration and Coexistence Considerations

To use the IBM ESCON hardware, you must perform a new device definition to MPIF. Define the hardware with the ZMPIF DEFINE DEVICE command. Issue the definition from a single processor within each loosely coupled complex that uses the ESCON CTC channel. Refer to TPF Operations for details on the format of the ZMPIF command.

S/360 and S/370* I/O interface CTC hardware (parallel CTC hardware) and ESCON CTC channels can coexist within a MPIF complex. A single processor can connect to a set of processors using the ESCON CTC and connect to another set of processors using parallel CTC hardware. However, both ends of a CTC link must use the same I/O protocol. One end of a link cannot be an ESCON channel while the other end is parallel CTC hardware.