OW52458: ENTERPRISE EXTENDER FAILS WITH BF-TG ERROR SENSE 08090000

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Enterprise Extender connection is being initiated by a Cisco
  router and receive BF-TG error with SENSE 08090000.
  IST1576I DYNAMIC SWITCHED MAJOR NODE ISTDSWMN CREATED
  IST1085I BF-TG ACTIVATION ERROR CP xxxx.xxxxxx SENSE = 08090000
  IST381I REQCONT FOR ID = CNV00003 FAILED - CANNOT DEFINE NODE
  IST680I CONNECTION REQUEST DENIED - ID = xxxxxx INVALID NETWORK
  NAME
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All zOS Communication Server V1R2 users of   *
  *                 Enterprise Extender connections.             *
  ****************************************************************
  * PROBLEM DESCRIPTION: Enterprise Extender connection          *
  *                      being initiated from a Cisco            *
  *                      router fails with BF-TG error           *
  *                      with SENSE 08090000                     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An Enterprise Extender (EE) connection being initiated from a
  Cisco router fails when attempting to use an EE connection
  network.  Message IST1085I will be received indicating
  a BF-TG error has been received with a sense code of
  08090000. In addition an IST381I or IST1267I message will be
  displayed on the host indicating that the REQCONT command has
  failed.
  
    For z/OS V1R2 it was decided to require a specific type of EE
  line to be available for a dial-in connection.  Therefore, when
  a host dials another host for an EE line initiation, the XID
  received is examined to determine what type of EE connection
  is being activated (EE Connection Network (Global or Local) or
  non-EE connection network).  An appropriate line is selected
  from one of the defined GROUPs, within the XCA major node.
  
    The problem is that the Cisco router always sends a null XID
  in their EE connection initiation.  This causes VTAM to always
  select a non-connection network line.  VTAM will then respond
  with a pre-negotiation XID.  At this time, the line is then
  associated with the other EE endpoint. The Cisco router will
  then send a pre-negotaion XID.  If a connection network is
  being used the CV4680 will have the V4680LCN bit set on.  The EE
  PU PAB (associated with the EE non-connection network line) will
  be dispatched with the prenegotiation XID and will build a
  REQCONT signal.  This signal will be forwarded through PUNS to
  the Configuration Services (CS) layer.  During REQCONT
  processing, module ISTACCQ3 will invoke ISTACCNP for TG
  negotiation.  ISTACCNP will notice that the line selected, EE
  non-connection network, does not match the criteria received
  on the REQCONT signal.  The REQCONT is then rejected with the
  following error messages:
  
  IST1576I DYNAMIC SWITCHED MAJOR NODE ISTDSWMN CREATED
  IST1085I BF-TG ACTIVATION ERROR CP xxxx.xxxxxx SENSE = 08090000
  IST381I  REQCONT FOR ID = xxxxxxxx FAILED - CANNOT DEFINE NODE
  IST680I  CONNECTION REQUEST DENIED - ID = xxxxxx INVALID NETWORK
           NAME
  

Problem conclusion

• The following modules/macros have been changed:
  
  IPTTIMER - Has been changed so allow an RPH to be specified
             on the generated TPWAIT macro.
  ISTIPNCB - Defined new bit, IPNCB_NONCN_LINK, to indicate at
             least one non-connection network line has been
             activated.  Bit IPNCB_DEAD_PORT has been redefined
             to be ABNL.
  ISTAUCAL - Has been changed to allocate the T1 and TL timer
             (ISTHTMBK) controls blocks within the ISTAUNCB
             itself.  Code has also been added to turn bit
             IPNCB_NONCN_LINK on when a non-connection network
             line is being activated.
  ISTAUCDL - Changed to no longer free the T1 and TL timers, as
             they are now contained within the AUNCB.
  ISTAUCII - Changed to correct line association for Cisco
             EE VRN partner.
  ISTAUNCB - Defined new bit, AUNCB_NULL_XID_RCVD, to indicate
             a null XID has been received from EE partner.
  
  ISTAUCOA - Both modules have been recompile only to pick up
  ISTAUCPF   IPNCB_DEAD_PORT definition change.
  
  Module ISTAUCLA has been included for maintenance purposes.
  

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:

  UW86344

Modules/Macros

• IPTTIMER ISTAUCAL ISTAUCDL ISTAUCII ISTAUCLA
  ISTAUCOA ISTAUCPF ISTAUNCB ISTIPNCB
  

Fix information

• Fixed component name

  VTAM V4 MVS/ESA

• Fixed component ID

  569511701

Applicable component levels

• R120 PSY UW86344

     UP02/03/26 P F203

Fix is available

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