Defining a SYSID

System identifiers (SYSIDs) are 2-byte numbers between 1 - 2036 that identify the IMS systems in an MSC network.

You can assign a local SYSID to an IMS system in the following ways:

  • MSNAME stage-1 system definition macro
  • MSC section of the DFSDFxxx member of the IMS PROCLIB data set
  • IMS type-2 command CREATE MSNAME

You can change SYSIDs online by using the IMS type-2 command UPDATE MSNAME NAME(msname) SET(SIDL | SIDR).