Defining IMS Connect support for ISC TCP/IP links

IMS Connect support for ISC TCP/IP is defined by the ISC, RMTCICS, and TCPIP statements in the IMS Connect configuration member in the IMS.PROCLIB data set.

The ISC statement defines most of the attributes of an ISC TCP/IP link to IMS Connect.

The RMTCICS statement defines the network addressing information of the CICS® subsystem.

The TCPIP statement specifies the ports on which IMS Connect receives transactions and data replies from CICS.

You can define one or more ISC TCP/IP links between an IMS subsystem and a CICS subsystem.

ISC links that connect to the same CICS subsystem can use the same RMTCICS connection definition or they can use separately defined RMTCICS connections:

ISC links that use the same RMTCICS connection definition must specify the same value on the RMTCICS parameter.
ISC links that use separately defined RMTCICS connections to the same CICS subsystem must specify different IDs on the RMTCICS parameter; however the different RMTCICS statements that each ISC statement references must specify the same host name or IP address and port number.

To define IMS Connect support for ISC TCP/IP code the following statements:

The ISC statement.
To code an ISC statement, you need the following values:
- The IMS ID of the local IMS system
- The APPLID of the remote CICS subsystem
- The node name that defines the ISC link to IMS
- The names by which IMS and IMS Connect are known to IMSplex
- The CICSPORT number of the port on which IMS Connect receives transactions and data replies from the CICS subsystem
- The ID of the RMTCICS statement that defines the network address and port of the CICS subsystem
The RMTCICS statement.
To code an RMTCICS statement, you need the following values:
- The host name of the CICS subsystem. This value is also specified on the CICSPORT keyword in the TCPIP statement.
- The port number of the port on which the CICS subsystem receives transactions and data replies from IMS.
The TCPIP statement.
To add ISC TCPIP support to an existing TCPIP statement, specify the CICSPORT parameter to define the port on which IMS Connect will receive transactions and data replies from CICS. This value is also specified on the CICSPORT keyword in the ISC statement.

The following example shows an IMS Connect configuration member that provides IMS Connect support for ISC TCP/IP. The HWS statement is included for completeness.

HWS=(ID=HWS1,XIBAREA=100,RACF=N)
TCPIP=(HOSTNAME=TCPIP,PORTID=(9998,19998,LOCAL),RACFID=GOFISHIN,
     TIMEOUT=000,
     IPV6=Y,
     PORT=(ID=15554),
     CICSPORT=(ID=1111,KEEPAV=1000),
     CICSPORT=(ID=3333,KEEPAV=1000),
     CICSPORT=(ID=6666,KEEPAV=1000),
     CICSPORT=(ID=7777,KEEPAV=1000),
     EXIT=(HWSSMPL0,HWSSMPL1,HWSCSLO0,HWSCSLO1,HWSSOAP1))
ISC=(ID=CICSA1,NODE=LU6NDPA,
     IMSPLEX=(MEMBER=HWS1,TMEMBER=PLEX1),
     LCLIMS=IMS1,RMTCICS=CICS1,CICSAPPL=CICS1,CICSPORT=1111)
ISC=(ID=CICSA2,NODE=LU6NDPB,
     IMSPLEX=(MEMBER=HWS1,TMEMBER=PLEX1),
     LCLIMS=IMS1,RMTCICS=CICS1,CICSAPPL=CICS1,CICSPORT=3333)
ISC=(ID=CICSA5,NODE=ISCTCP1,
     IMSPLEX=(MEMBER=HWS1,TMEMBER=PLEX1),
     LCLIMS=IMS1,RMTCICS=CICS1,CICSAPPL=CICS1,CICSPORT=6666)
ISC=(ID=CICSA6,NODE=ISCTCP2,
     IMSPLEX=(MEMBER=HWS1,TMEMBER=PLEX1),
     LCLIMS=IMS1,RMTCICS=CICS1,CICSAPPL=CICS1,CICSPORT=7777)
RMTCICS=(ID=CICS1,HOSTNAME=ABC.EXAMPLE.COM,PORT=23456)