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PH04703: VSWITCH PRIORITY QUEUING - TCP/IP SUPPORT

A fix is available

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APAR status

  • Closed as new function.

Error description

  • TCP/IP (VSwitch Controller) support required for VSwitch
    Priority Queuing (VM66219).
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: Users that want to exploit VSwitch Priority  *
    *                 Queuing.                                     *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    ****************************************************************
    * RECOMMENDATION: APPLY PTF                                    *
    ****************************************************************
    With the PTFs for APARs VM66219 and PH04703, z/VM
    provides support for VSwitch Priority Queuing.
    

Problem conclusion

Temporary fix

Comments

  • Virtual Switch Priority Queuing Enhancement
    
    z/VM is enhanced to improve data transmissions from a virtual
    NIC to a physical network via the virtual switch uplink port.
    Internal virtual switch data transmission is changed from a
    first-in, first-out (FIFO) order to a four-level priority
    queuing scheme.  By default, the virtual switch will distinguish
    between virtual switch and virtual NIC transmissions to the
    physical network. Virtual switch transmissions required to
    manage an uplink port or virtual NIC are sent to the physical
    network ahead of any virtual NIC transmissions. This will insure
    virtual switch management is maintained during high bandwidth
    uplink port usage.
    Virtual switch support is added to exploit OSA-Express feature's
    priority queuing capabilities.  By turning on Virtual Switch
    Priority Queuing, instead of activating a single QDIO output
    queue on the uplink port, the z/VM virtual switch will
    establish four QDIO output queues for outbound data
    transmissions.  The four QDIO output queues provide four
    independent interfaces to the OSA-Express feature, one for each
    priority.  The highest priority queue (Queue 0) is used by the
    z/VM virtual switch to provide switch management communications
    and the other three priorities (Queue 1-3) may be configured by
    a system administrator to prioritize outbound transmissions to
    the physical network for virtual NICs connected to the virtual
    switch.
    Refer to z/VM Connectivity Version 7 Release 1 (SC24-6267-01)
    for more information.
    
    DIRMAINT support for VSwitch Priority Queuing requires VM66223.
    
    To support APARS VM66219 and PH04703, new editions of the
    following publications are available:
        SC24-6267-01: Connectivity
        SC24-6268-02: CP Commands and Utilities Reference
        GC24-6270-01: CP Messages and Codes
        SC24-6271-01: CP Planning and Administration
        SC24-6272-01: CP Programming Services
        GC24-6286-02: General Information
        GC24-6294-02: Migration Guide
        SC24-6301-02: Performance
    
    Additional information can be found at
    http://www.vm.ibm.com/virtualnetwork/
    

APAR Information

  • APAR number

    PH04703

  • Reported component name

    TCP/IP FOR Z/VM

  • Reported component ID

    5735FAL00

  • Reported release

    710

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    YesSpecatt / New Function / Xsystem

  • Submitted date

    2018-10-30

  • Closed date

    2019-05-13

  • Last modified date

    2019-09-26

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    UI62768

Modules/Macros

  • CMNETST  TCBASTY  TCMIB    TCMON    TCPARSE  TCPIP    TCSWITCH
    TCTOOSD  TCUTIL
    

Publications Referenced
SC24626701 SC24626802 GC24627001 SC24627101 SC24627201
GC24628602 GC24629402 SC24630102    

Fix information

  • Fixed component name

    TCP/IP FOR Z/VM

  • Fixed component ID

    5735FAL00

Applicable component levels

  • R710 PSY UI62768

       UP19/05/14 P 1902  

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.



Document information

More support for: z/VM family

Software version: 710

Operating system(s): VM/ESA, z/VM

Reference #: PH04703

Modified date: 26 September 2019