VM66522: HIPERSOCKETS BRIDGE CONNECTIVITY LOSS ON SHUTDOWN

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Linux guests using the HiperSockets Bridge on a VSwitch lose
  connectivity after relocation and source system is SHUTDOWN.
  The issue relates to moving the Active Bridgeport Controller
  and Take-Over activity on the Global VSwitch when shutting
  down the source system.
  

Local fix

• Apply PTF
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of Global VSwitches with           *
  *                 HiperSockets Bridgeports connected           *
  *                 during SHUTDOWN processing.                  *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION: APPLY PTF                                    *
  ****************************************************************
  In preparation for a shutdown of an SSI member, all guests using
  HiperSockets connected to a VSwitch via a HiperSockets Bridge
  were relocated to a second SSI member and maintained
  connectivity.  When the first member was shutdown, there was no
  connectivity to the HiperSockets guests on the second member.
  To restore connectivity, the first member had to be brought
  back up or the VSwitch had to be detached and recreated.
  

Problem conclusion

• In the case of a shutdown, there is an abnormal termination of
  the OSA uplink devices associated with a Global VSwitch.  This
  failure caused the OSA to go into a "MAC Address take-over"
  operation and a remaining active network connection sharing the
  same LAG port will take over data transfer operations through
  the IVL data plane.  This remains until the failing OSA
  is restored.  It is the interaction of the take-over operation
  with the movement of the Active HiperSockets bridgeport
  controller that leads to the connectivity loss.
  To address this, shutdown processing is updated to gracefully
  terminate the network connections for the uplinks associated
  with Global VSwitches and any Bridge Ports.
  

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:

  UM35900 UM35901

Modules/Macros

• HCPLAN   HCPMSS   HCPSLMBK HCPSWM   HCPSWU   HCPVNS   HCPWRP
  HCPWRPBK
  

Fix information

• Fixed component name

  VM CP CP

• Fixed component ID

  568411202

Applicable component levels

• R710 PSY UM35900

     UP21/09/09 P 2201

• R720 PSY UM35901

     UP21/09/09 P 2201

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.