MPROUTE Routing Table Not Updated When CTC Link is Started

 
 APAR Identifier ...... PQ52180      Last Changed ........ 01/10/31
 MPROUTE ROUTING TABLE NOT UPDATED WHEN CTC LINK IS STARTED
 
 Symptom ...... IN INOUT             Status ........... CLOSED  PER
 Severity ................... 3      Date Closed ......... 01/10/23
 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: SHIPMENT - Packaged solution is available for
                           shipment.
 
 PE PTF List:
 
 PTF List:
 Release 3A0   : UQ59103 available 01/10/30 (1000 )
 Release 410   : UQ59104 available 01/10/30 (1000 )
 Release 420   : UQ59105 available 01/10/30 (1000 )
 
 Parent APAR:
 Child APAR list:
 
 ERROR DESCRIPTION:
 Customer has a CTC connection defined between a Linux guest
 and a VM host, which is connected to a remaining network by
 two OSA QDIO adapters.
 
 The VM TCP/IP host is first initialized, after which the Linux
 guest is initialized.  Following this, PINGs between the Linux
 and VM hosts succeed, while those between the Linux guest and
 hosts elsewhere in the network fail.
 
 Recycling the VM MPROUTE server machine resolves this
 situation.  Investigating the problem reveals that the VM
 TCP/IP server is not updating MPROUTE once an ERROR-STATUS
 condition for the CTC connection has been cleared.
 
 LOCAL FIX:
 
 PROBLEM SUMMARY:
 ****************************************************************
 * USERS AFFECTED: All users of MPRoute                         *
 ****************************************************************
 * PROBLEM DESCRIPTION: The VM TCP/IP stack does not send a     *
 *                      status update to the MPRoute server     *
 *                      when an Error-Status condition for      *
 *                      a CTC connection has been cleared.      *
 ****************************************************************
 * RECOMMENDATION: APPLY PTF                                    *
 ****************************************************************
 The VM TCP/IP stack sends information to the MPRoute server
 whenever interfaces change state.  For most devices, a state
 change is reflected in the DeviceStatus field of the DCB.  For
 CTC devices, however, the DeviceStatus may indicate that the
 device is ready but the ErrorStatus flag in the LCB is set
 to indicate that there is still a problem.
 
 PROBLEM CONCLUSION:
 TCTOCTC has been updated to call the CTCLinkStateChange
 routine whenever the ErrorStatus changes.  This will invoke
 a call to the LinkStateChange routine in TCMIB.
 LinkStateChange will check the new ErrorStatus against the
 old ErrorStatus.  If there is a change, an update will be
 sent to the MPRoute server.
 
 TEMPORARY FIX:
 
 COMMENTS:
 
 MODULES/MACROS:   TCPIP    TCTOCTC
 
 SRLS:      NONE
 
 RTN CODES:
 
 CIRCUMVENTION:
 
 MESSAGE TO SUBMITTER: