z/OS Communications Server 2.4 New Function Summary IBM GC27-3664-40 Note: Before using this information and the product it supports, be sure to read the general information under “Notices” on page 203. This edition applies to Version 2 Release 4 of z/OS® (5650-ZOS), and to subsequent releases and modifications until otherwise indicated in new editions. Last updated: 2021-06-21 © Copyright International Business Machines Corporation 2000, 2021. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Tables................................................................................................................. vii About this document............................................................................................xv Who should read this document................................................................................................................ xv How this document is organized................................................................................................................ xv How to use this document.........................................................................................................................xvi How to contact IBM service.................................................................................................................xvi Conventions and terminology that are used in this information.............................................................. xvi Prerequisite and related information....................................................................................................... xvii Summary of changes for New Function Summary............................................... xxiii Changes made in z/OS Version 2 Release 4............................................................................................xxiii Changes made in z/OS Version 2 Release 3............................................................................................xxiv Changes made in z/OS Version 2 Release 2, as updated June 2017......................................................xxv Changes made in z/OS Version 2 Release 2, as updated September 2016........................................... xxv Changes made in z/OS Version 2 Release 2, as updated March 2016................................................... xxv Changes made in z/OS Version 2 Release 2............................................................................................ xxv Chapter 1. Planning to use new functions...............................................................1 Introduction to z/OS Communications Server............................................................................................ 1 Determining which documents to use when migrating.............................................................................. 1 IP encryption features................................................................................................................................. 3 Planning checklist........................................................................................................................................ 3 TCP/IP packaging process........................................................................................................................... 4 MVS data sets......................................................................................................................................... 4 File system files...................................................................................................................................... 7 Defining SNA data sets.................................................................................................................................7 Data sets containing information for z/OS V2R4 Communications Server.........................................11 Chapter 2. Roadmap to functions......................................................................... 21 Chapter 3. V2R4 new function summary...............................................................25 Hardware support...................................................................................................................................... 25 Shared Memory Communications - Direct multiple IP subnet support (SMC-Dv2)...........................25 Communications Server support for OSA-Express7S 25 GbE features..............................................27 Communications Server support for 25 GbE RoCE Express2 features.............................................. 29 Communications Server QDIO display enhancements.......................................................................29 Usability and skills..................................................................................................................................... 30 HiperSockets Converged Interface support........................................................................................ 30 Scalability and performance......................................................................................................................33 zERT Aggregation recording interval....................................................................................................33 Inbound Workload Queueing (IWQ) support for IBM z/OS Container Extensions.............................34 Sysplex notification of TCP/IP stack join or leave............................................................................... 36 Network support for z/OS Container Extensions.................................................................................37 IWQ support for IPSec......................................................................................................................... 39 Enhancing security.....................................................................................................................................41 IBM Health Checker for use of native TLS/SSL support for DCAS...................................................... 41 IBM Health Checker for use of native TLS/SSL support for the FTP server........................................42 IBM Health Checker for use of native TLS/SSL support for the TN3270 server.................................44 iii Sysplex Autonomics for IPSec............................................................................................................. 44 IBM zERT Network Analyzer database administration enhancements.............................................. 46 AT-TLS support for TLS v1.3.................................................................................................................47 z/OS Encryption Readiness Technology (zERT) aggregation.............................................................. 51 IBM zERT Network Analyzer................................................................................................................ 54 TN3270E Telnet server Express Logon Feature support for Multi-Factor Authentication.................56 Application development...........................................................................................................................57 SMTPD compatibility enhancements for CSSMTP...............................................................................57 Communications Server resolver enhancements............................................................................... 58 Code page enhancements for CSSMTP............................................................................................... 59 Chapter 4. Communications Server interface changes for z/OS V2R4.................... 61 Communications Server IP interface changes..........................................................................................61 PROFILE.TCPIP configuration file........................................................................................................ 62 Configuration files................................................................................................................................ 64 RACF interfaces.................................................................................................................................... 68 Operator commands............................................................................................................................ 69 TSO commands.................................................................................................................................... 72 z/OS UNIX commands..........................................................................................................................74 Application programming interfaces and network management interfaces......................................76 Environment variables..........................................................................................................................80 Socket APIs.......................................................................................................................................... 80 IPCS subcommands............................................................................................................................. 80 SNMP MIB modules............................................................................................................................. 82 User exits..............................................................................................................................................83 Application