CICS® systems that use XRF have two applid names: a generic name and a specific name. The names are specified on the APPLID(=generic-applid,specific-applid) system initialization parameter.
If you are using XRF, you must specify both names on the APPLID parameter. This is because the active and alternate CICS systems must have the same generic applid and different specific applids.
Do not confuse the term "generic applid" with "generic resource name".
Remember that "generic" and "specific" applids apply only to systems that use XRF; CICS systems that don’t use XRF have only one applid.
For XRF, a CICS system’s generic applid is defined on the APPLID system initialization parameter and is the name by which CICS is known in the network. (That is, it is the name quoted by remote CICS systems, on the NETNAME option of CONNECTION definitions, to identify this CICS.)
A CICS system’s specific applid is used to distinguish between the pair of XRF systems. It is the name quoted on a VTAM® APPL statement, to identify this CICS to VTAM.
A CICS system’s generic resource name is defined on the GRNAME system initialization parameter, and enables CICS to become a member of a VTAM generic resource group. See Installation considerations for VTAM generic resources.
Note, in particular, that: