An internet address is the 32-bit address assigned to a TCP/IP host and usually represented in dotted decimal form. For example: 9.67.224.96. The address identifies both a physical network within the internet and an individual host within that network.
A TCP/IP host can be an MVS™ system or a Windows or UNIX workstation. To configure ISPF C/S communications you need to know the dotted decimal internet address associated with the workstation on which the ISPF WSA graphical user interface is to be displayed. In many enterprises the workstation internet address is obtained from a network administrator and assigned to the workstation during installation and customization of the TCP/IP workstation software. For information about installing and customizing the TCP/IP software used on your workstation, consult the documentation supplied by your TCP/IP software vendor. If you have already installed TCP/IP on your workstation and you do not know your TCP/IP internet address, but you do know your TCP/IP workstation host name (such as JSMITH, ACCT23), you can determine the internet address as follows:
| If you have this TCP/IP workstation software | do this on the workstation |
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From a Windows command prompt enter ipconfig (or winipcfg in some systems). The numeric internet address of the workstation should display in the IP Configuration panel. |
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From the AIX command prompt enter host <hostname>. The numeric internet address of the workstation identified by <hostname> should appear in the reply. |
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From the HP-UX command prompt enter ping <hostname>. The numeric internet address should appear in the output of the command. Use <Ctrl-c> to end the command. |
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From the Solaris command prompt enter ping -s <hostname>. The numeric internet address of the workstation identified by <hostname> should appear in the reply. |
UNIX users might need to specify a unique port on the workstation to be used for communication, in addition to the internet address. This is necessary because multiple ISPF WSA components can run on any one UNIX workstation at the same time. The port is specified by appending :<port#> to the end of the internet address. By default, all of the TCP/IP protocols are defined in the /etc/services file. This file can be viewed so you can choose a port that is not currently reserved by another application. Ports 0 through 1024 are reserved for system use. The port number must also be specified in the ISPF WSA graphical user interface. Do this through the Options pull-down menu, Set TCP/IP Port choice. The port number specified on the host must be the same as the port entered in the ISPF WSA graphical user interface.
The ISPF C/S component uses the C-socket interface for TCP/IP communications and supports z/OS® Communications Server: IP. ISPF C/S does not support IPV6 connections.
See z/OS V2R2.0 Communications Server: IP Configuration Guide for a description of how the TCP/IP started task procedure name is resolved from the TCPIPJOBNAME statement in the TCPIP.DATA configuration data set.