TCPIP

The TCPIP system initialization parameter specifies whether CICS® TCP/IP services are to be activated at CICS startup.

TCPIP={YES|NO}

YES: The IPIC, HTTP, and ECI over TCP/IP services can process work. This is the default value.
NO: The IPIC, HTTP, and ECI over TCP/IP services cannot be enabled.

For IPIC, you must specify TCPIP=YES and ISC=YES.

Note: The TCPIP system initialization parameter affects only CICS internal TCP/IP Services defined by TCPIPSERVICE resource definitions. It has nothing to do with the TCP/IP socket interface for CICS feature of z/OS® Communications Server.