No special configuration is needed for back-end systems, except that you must provide and manage LUs (simulated terminals) for FEPI use. These terminals are defined to the back-end CICS® or IMS™ system just like real terminals. They can be explicitly defined or autoinstalled as required. They do not need to be defined to VTAM® in the back-end system, to which they appear as real terminals on that system. VTAM uses the various network definitions to determine how and where to route data; it can be routed locally, cross-domain, or cross-network. The LU name corresponds to the front-end node name. (Similarly, the VTAM applid of the back-end system corresponds to the applid in the FEPI target definition.) The diagram of the sample configuration in Figure 2 illustrates these relationships.
If your back-end systems use the extended recovery facility (XRF), you must use their generic applids, rather than specific ones, in your FEPI target definitions. See Using FEPI with XRF.
For CICS back-end systems, acceptable terminal definitions (TYPETERMs) are:
These definitions match the VTAM mode table entries shown in Table 3. You must create your own TYPETERMs for 3279 model 5 and PS/55 devices, if required, because no such definitions are supplied by CICS. If the back-end system is using CICS/MVS Version 2, you must create all your own TYPETERMs or copy them from the front-end system. For information about defining terminals to CICS, see the CICS Resource Definition Guide.
For terminals to be used by FEPI, the following settings are required on the TYPE or TERMINAL system definition macros:
The following non-default settings are recommended. (FEPI will support the default settings as well.)
The following example defines some IMS terminals for use by FEPI. You may need to customize it for use in your own IMS environment.
TYPE UNITYPE=SLUTYPEP,MODETBL=IBM3600, x
OPTIONS=(OPTACK,FORCRESP,NORELRQ,BID),OUTBUF=512
TERMINAL NAME=IMSLUP01
NAME IMSLUP01
TERMINAL NAME=IMSLUP02
NAME IMSLUP02
TERMINAL NAME=IMSLUP03
NAME IMSLUP03
TERMINAL NAME=IMSLUP04
NAME IMSLUP04
For further information, see IMS considerations.
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