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IV64364: TCP AND UDP RECEIVE CHECKSUM OFFLOAD DISABLEMENT FIX APPLIES TO AIX 6100-08

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • If customer disables EITHER the cksum_udp or cksum_tcp
    ODM attributes, adapter-based receive packet checksum
    offload will be disable for BOTH TCP and UDP.  Because
    the default value for cksum_udp and cksum_tcp attributes
    is "yes", this issue impacts only customers who have modified
    one of these ODM attributes.  Observed symptom may be lower
    than expected receive performance.
    

Local fix

Problem summary

  • If customer disables EITHER the cksum_udp or cksum_tcp
    ODM attributes, adapter-based receive packet checksum
    offload will be disable for BOTH TCP and UDP.  Because
    the default value for cksum_udp and cksum_tcp attributes
    is "yes", this issue impacts only customers who have modified
    one of these ODM attributes.  Observed symptom may be lower
    than expected receive performance.
    

Problem conclusion

  • Modify receive path checksum offload enforcement algorithm
    so that it does not disable both TCP and UDP checksum
    offload if user requests only TCP or UDP offloads.
    

Temporary fix

Comments

  • 6100-08 - use AIX APAR IV64364
    6100-09 - use AIX APAR IV59846
    6100-09 - use AIX APAR IV59846
    7100-02 - use AIX APAR IV70665
    7100-03 - use AIX APAR IV60146
    7100-04 - use AIX APAR IV59855
    

APAR Information

  • APAR number

    IV64364

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-09-02

  • Closed date

    2014-09-02

  • Last modified date

    2016-05-10

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

    IV59846

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

Fix information

  • Fixed component name

    AIX 610 STD EDI

  • Fixed component ID

    5765G6200

Applicable component levels

  • R610 PSY U867304

       UP15/01/18 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Standard Edition

Software version: 610

Operating system(s): AIX

Reference #: IV64364

Modified date: 10 May 2016