IUCV Connectivity is Lost if Device is Stopped / Started

 
 APAR Identifier ...... PQ84038      Last Changed ........ 04/02/24
 IUCV CONNECTIVITY IS LOST IF DEVICE IS STOPPED / STARTED
 
 Symptom ...... IN INCORROUT         Status ........... CLOSED  PER
 Severity ................... 3      Date Closed ......... 04/02/17
 Component .......... 5735FAL00      Duplicate of ........
 Reported Release ......... 3A0      Fixed Release ............ 999
 Component Name TCP/IP V2 FOR V      Special Notice
 Current Target Date ..              Flags
 SCP ...................
 Platform ............
 
 Status Detail: PACKAGING - Solution is being packaged for
                            shipment.
 
 PE PTF List:
 
 PTF List:
 Release 3A0   : UQ85266 - PTF not available yet
 Release 430   : UQ85351 - PTF not available yet
 Release 440   : UQ85352 - PTF not available yet
 
 Parent APAR:
 Child APAR list:
 
 ERROR DESCRIPTION:
 IUCV connectivity between a VM TCP/IP host and a Linux guest is
 lost when an IUCV device is stopped and then restarted by TCPIP
 on VM (via the "NETSTAT OBEY STOP " and "NETSTAT OBEY
 START " commands.  After this, a VM "NETSTAT DEVLINKS"
 command shows the device with "Will retry connect" status,
 while the Linux guest reports the device as being "connected."
 and pings from the Linux guest result in timeouts.  The "Will
 retry connect" status on the VM host can be cleared only by
 recycling the Linux guest.
 
 LOCAL FIX:
 none
 ADDITIONAL INFORMATION:
 MT04000
 
 PROBLEM SUMMARY:
 ****************************************************************
 * USERS AFFECTED: Users with IUCV links, especially to Linux   *
 *                 guests                                       *
 ****************************************************************
 * PROBLEM DESCRIPTION:                                         *
 ****************************************************************
 * RECOMMENDATION: APPLY PTF                                    *
 ****************************************************************
 An incoming IUCV pending connection request is not recognized as
 being associated with an IUCV link if the device is not started.
 In some situations, such as when a device is stopped and the
 IUCV path is severed, the other side may attempt to reconnect
 before the device is started. This connection attempt will be
 ignored and may prevent the device from being restarted.
 
 PROBLEM CONCLUSION:
 Code has been changed to recognize a connection request for an
 IUCV link regardless of whether the device is started. If the
 device is started, the request will be accepted; otherwise, it
 will be severed.
 
 TEMPORARY FIX:
 
 COMMENTS:
 
 MODULES/MACROS:   TCPIP    TCTOIUC
 
 SRLS:      NONE
 
 RTN CODES:
 
 CIRCUMVENTION:
 
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