IBM Z Simplification

IBM Z Simplification

IBM Z Simplification

Transforming IBM Z into an simpler, more intuitive platform so every user, from beginners to experts, can learn faster, work confidently, and drive meaningful outcomes.

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  • 1.  1. Networking Deprecations

    Posted Wed April 15, 2026 09:07 AM

    Removal of the Common INET (CINET) Physical File System

    z/OS 3.2 is planned to be the last release of the operating system to support the Common INET (CINET) Physical File System, driven by the need for simplification. The Common INET configuration, found in the BPXPRMxx PARMLIB member, is usually used to set up multiple TCP/IP stacks for socket communication. Clients using the CINET capability should move to a single TCP/IP stack for socket communication, known as the INET Physical File System. INET, also configured in the BPXPRMxx PARMLIB member, has comparable capability and is the strategic network socket communication file system for the z/OS platform.

    Links to the relevant documentation

    Statements of direction: z/OS - IBM Documentation



    ------------------------------
    Martin Jonason
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  • 2.  RE: 1. Networking Deprecations

    Posted Wed April 15, 2026 09:15 AM
    Edited by Martin Jonason Wed April 15, 2026 09:26 AM

    We currently use multipel TCP/IP started tasks to separate different network zones within a single LPAR. Once CINET is removed, the only remaining options for network separation are the NetAccess function or the creation of additional LPARs.

    I would like to see additional mechanisms that allow traffic separation within a single TCP/IP stack.



    ------------------------------
    Martin Jonason
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  • 3.  RE: 1. Networking Deprecations

    Posted Wed April 29, 2026 04:20 AM

    Hello Martin,

    In case you are not aware, it has been updated by another SOD (Statements of direction) published this week.

    https://www.ibm.com/docs/en/announcements/statements-direction-zos-2026-04-28

    Statements of direction: z/OS

    Published: 28 April 2026 (AD26-0431)

    Withdrawal of the statement of direction for the Removal of the Common INET (CINET) Physical File System

    Hope this helps.

    Thanks!

    Shigeki



    ------------------------------
    Shigeki Kimura
    zMigration Office Technical Lead
    IBM Japan
    ------------------------------

    Original Message


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