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:
MESSAGE TO SUBMITTER:
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