Last Updated: 18 June 2025

Service and feature packs released for the z/VM 7.4 TCPIP component


z/VM 7.4 introduced linear service to the product. Service fix packs and feature packs are now released on a regular cadence. By installing the latest pack you will receive all service fixes and features for the component. Refer to the change log table below for a comprehensive list of changes to the component since the z/VM 7.4 General Availability date.

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A list of service for z/VM 7.4 TCPIP
Release Level Available Type Crit PE Security HIPER APAR PTF Details
7.4 0100 20250618June 18, 2025 Hardware support No No No PH65378 UO03340 z/VM 7.4 TCPIP Hardware Support - Feature 01 Fix 00
  • IBM z17 Support and Exploitation
    Provides a native device driver for the z/VM TCP/IP stack that exploits EQDIO adapters for network traffic.
7.4 0001 20250421April 21, 2025 Fix pack No No No PH66109 UO02862 z/VM 7.4 TCPIP Fix Pack - Feature 00 Fix 01
  • z/VM FTP Client Hangs When Transferring Open File
    A reference to the TCB that contains the bytes that have not yet reached a client was added. A check was added to TcpStatus/Tcp6Status that checks if this TCB contains any bytes, and if so adds this byte count to the BytesToRead field. Another check was added to the FTP client if the 125 is received from an FTP server, a Tcp6Status call is made to check if there are currently outstanding BytesToRead.
     
  • z/VM FTP Client Fails On MKDIR With Spaces
    Fix made in FTP client parser code, so that commands "MKDIR" and "RMDIR" interpret arguments containing spaces correctly.