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VM66522: HIPERSOCKETS BRIDGE CONNECTIVITY LOSS ON SHUTDOWN

A fix is available

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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 number

    VM66522

  • Reported component name

    VM CP CP

  • Reported component ID

    568411202

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2021-04-07

  • Closed date

    2021-08-27

  • Last modified date

    2022-03-28

  • 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 I 1000

  • 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.

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Document Information

Modified date:
29 March 2022