PH22695: Shared Memory Communications-Direct Memory Access Version 2 (SMC-Dv2) Multiple IP Subnet Support

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• New Function - Shared Memory Communications-Direct Memory Access
  Version 2 (SMC-Dv2) Multiple IP Subnet Support
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of the IBM Communications Server                   *
  * for z/OS Version 2 Release 4:                                *
  * Shared Memory Communications-Direct (SMC-D)                  *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * New Function - Shared Memory Communications-Direct Version 2 *
  * (SMC-Dv2)                                                    *
  * Multiple IP Subnet Support                                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply PTF                                                    *
  ****************************************************************
  This APAR has a dependency on VTAM APAR OA59152 which requires
  both APARs to be applied concurrently; unexpected results may
  occur if both APARs are not applied concurrently.
  
  If you currently use or plan on using Shared Memory
  Communications-Direct (SMC-D), you must also install the PTF of
  z/OS IOS PCIe Services APAR OA59325. Failure to do so will
  result in activation failures when z/OS Communications Server
  attempts to start some ISM interfaces.
  
  For documentation updates to existing publications consult the
  following URL:
  https://www.ibm.com/support/knowledgecenter/SSLTBW_2.4.0/com.ibm
  .zos.v2r4.halg001/rinsmcv224.htm.
  
  SMC-Dv2 is enabled with new IBM Z capability provided by the IBM
  Z Internal Shared Memory (ISM) function. The new ISMv2
  capability is available on IBM z15. For IBM z15 T01, refer to
  the MCL number P46601.067 driver D41C. The ISMv2 support is in
  the base of the IBM z15 T02.
  .
  

Problem conclusion

• If you plan to enable SMC-Dv2 on a host which has connections to
  a down-level SMC (SMC-Dv1 or SMC-Rv1) system (z/OS CommServer,
  Linux on Z, and AIX), the down-level host will require the
  following toleration maintenance applied prior to enabling
  SMC-Dv2:
  
  For z/OS CommServer, the down-level host will need the
  appropriate PTF for PH17556.
  
  For Linux on Z, see Linux on Z webpage
  https://linux-on-z.blogspot.com/p/smc-for-linux-on-ibm-z.html
  for information related to toleration requirements.
  
  
  For AIX, see AIX webpage,
  https://www.ibm.com/support/knowledgecenter/en/ssw_aix_72/rdma/s
  mc_r.html , for information related to toleration requirements.
  
  
  NOTE:  Failure to apply the proper toleration maintenance may
  result in connection hangs or failures when SMC-Dv2 is enabled
  on z/OS.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UI71143 UI71144

Modules/Macros

• EZACFMS1 EZACDTNE EZBIEPRO EZACDPRG EZAFTPGU EZBIFGIT EZBNMRHC
  EZBIPSTR EZACFYAC EZBIFIND EZACDDNE EZBIPEPR EZACDNMS EZBITTRM
  EZBSLUT2 EZASAIOC EZBTCICT EZARRSTC EZBTIINI EZASMF77 EZBITTUB
  EZBNMFTP EZAIKSMF EZBTTCVB EZBTIGBL EZBNMRHA EZASAIO2 EZBDGCTR
  EZBIFIUM EZBTCUTL EZBIEITF EZBDGPRF EZBPTDAT EZACDSTR EZBIFIUT
  EZACFPPT EZBITMST EZACFPPR EZACFPTV EZBDGSTO EZBIFGID EZBSLINB
  EZBITINI EZACDHLP EZBSCUTL EZACDONE EZBPTSMC EZBNMGIF EZACFPAR
  EZBTCSYN EZACFLEX EZACFALG EZASMF   EZACFPAL EZACFPIT EZACFPVA
  EZBNMGDL EZBSMDLS EZBTCFCN EZACFATM EZBIETI  EZBCTFME EZAMLCON
  EZBIEACC EZBTCPCN EZACFPR2 EZACFPV6 EZBIFSTC EZBSLOUT EZBIPSUB
  EZACFMMN EZBNMMPA EZACFGIO EZACFMUT EZBNMMPC EZBTCRD  EZACFPSE
  EZASNAA3 EZBTMPRS EZACDNE6 EZACFPSC EZACDNE1 EZBDGTCP EZBSLUTL
  EZACDNE0 EZACDNE2 EZBIFIOC EZACFSM1 EZACDNM6 EZBNMGTC EZBTCIC2
  EZBTSCON EZBIETCP
  

Fix information

• Fixed component name

  TCP/IP MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R240 PSY UI71143

     UP20/09/04 P F009

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.