Introduction to IP interconnectivity

IP interconnectivity (IPIC) is a type of intercommunication link that enables you to integrate CICS-to-CICS communications into an IP infrastructure and use the secure sockets layer (SSL) to provide security.

IPIC uses the same flow of data and control from the local program to the remote program as ISC. IPIC also supports two-phase commit, as well as channels and containers.

IPIC supports both IPv4 and IPv6 TCP/IP protocols. For more information about configuring IPv4 or IPv6 addressing, see Configuring support for communicating over a TCP/IP network.

IPIC supports the following types of intercommunication functions for their respective product releases:
  • Distributed program link (DPL) calls between CICS® TS 3.2 or later regions.
  • Distributed program link (DPL) calls between CICS TS and TXSeries® Version 7.1 or later.
  • Asynchronous processing of EXEC CICS START, START CHANNEL, and CANCEL commands, between CICS TS 4.1 or later regions.
  • Transaction routing of 3270 terminals, where the terminal-owning region (TOR) is uniquely identified by an APPLID between CICS TS 4.1 or later regions.
  • Enhanced method of routing transactions that are invoked by EXEC CICS START commands between CICS TS 4.2 or later regions.
  • ECI requests from CICS Transaction Gateway Version 7.1 or later.
  • Function shipping of all file control, transient data, and temporary storage requests between CICS TS 4.2 or later regions. Function shipping of file control and temporary storage requests using IPIC connectivity is threadsafe between CICS TS 4.2 or later regions. Function shipping of transient data requests using IPIC connectivity is threadsafe between CICS TS 5.1 or later regions.
  • Threadsafe processing for the mirror program and the LINK command in CICS TS 4.2 or later regions to improve performance for threadsafe applications.