CICS Transaction Gateway V5 The WebSphere ... - IBM Redbooks

3.3 VTAM definitions
44 CICS Transaction Gateway V5
In this section, we present the TCP/IP, VTAM and VTAM AnyNet definitions we
used on our z/OS system.
Basic VTAM definitions
TCP62 requires CICS and VTAM to be correctly configured to accept LU 6.2
parallel sessions. In our VTAM network, our network was already configured as
USIBMSC (using NETID=USIBMSC in the VTAM startup options). We also
configured a VTAM LOGMODE for the APPCMODE mode group and specified
PARSESS=YES on our VTAM APPL definition. For further details on defining
VTAM definitions, refer to 2.3, “APPC connections and VTAM” on page 25.
TCP/IP
The TCP/IP address (1) and host name for the z/OS system are defined by
default in the PROFILE.TCPIP and TCPIP.DATA data sets. In our configuration
the data set was TCPIPMVS.SC66.TCPPARMS and it has members TCPPROF
and TCPDATA. The best way to find these data sets is to look from SDSF DA for
active started tasks or from your PROCLIB. These members have a lot of
information but we are only interested with the TCPIPJOBNAME, HOSTNAME,
DOMAINNAMEORIGIN and HOME parameters. The first three can be found
from the TCPDATA member, and the HOME parameter is found in the TCPPROF
member. In our configuration:
TCPIPJOBNAME TCPIPMVS is the TCP/IP started task name
HOSTNAME wtsc66 is the host name of our z/OS system
DOMAINNAMEORIGIN itso.ibm.com is the domain name
HOME 9.12.6.6 is the TCP/IP address
Tip: You can also use the TSO command HOMETEST to verify the IP
configuration on your z/OS system.
TCP/IP major node
The VTAM TCP/IP major node defines the AnyNet interface between TCP/IP and
VTAM. You need only one TCP/IP major node for each LPAR. If you do not know
your TCP/IP major node name, you can see if it is defined using the VTAM
command D NET,MAJNODE. On our system, this displayed the following entry:
IST089I APTCP01 TYPE = TCP/IP MAJOR NODE, ACTIV
Our TCP/IP major node definition is shown in Example 3-1 on page 45. The
important parameters are the port and possibly the TCP/IP job name
(TCPIPJOB), if you are using multiple TCP/IP stacks.