IBM Support

IV64187: IPTRACE INCORRECTLY REMOVES THE TAP CREATED BY OTHER APPLICATION APPLIES TO AIX 7100-02

A fix is available

Subscribe

You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • IPTRACE incorrectly removes the TAP created by another
    application. This causes the other application to stop
    receiving packets or no response.
    In this case, the problem was seen if iptrace was started
    and stopped when IBM Load Balancer is run on AIX.
    When iptrace stops it removes the TAP created by Load
    balancer and it stops receiving packets delivered to that
    host.
    The problem can also been seen if tcpdump and iptrace
    are run together on the same AIX.
    
    1) Start tcpdump
    2) Start iptrace
    3) Stop iptrace
    4) tcpdump will stop sniffing packets on the host.
    

Local fix

  • Run,
    
    # iptrace -u
    several times until
    
    iptrace unloaded messages are seen
    
    Restart the tcpdump or application (load balancer).
    
    Do not use iptrace with tcpdump or load balancer.
    

Problem summary

  • tcpdump or any other packet sniffing applications will stop
    receiving packets, if iptrace is started and stopped.
    

Problem conclusion

  • iptrace code is modified to retain any existing filters that
    were added by other packet sniffing applications.
    

Temporary fix

Comments

  • 6100-08 - use AIX APAR IV55797
    6100-09 - use AIX APAR IV63110
    7100-02 - use AIX APAR IV64187
    7100-03 - use AIX APAR IV63106
    

APAR Information

  • APAR number

    IV64187

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-08-29

  • Closed date

    2014-08-29

  • Last modified date

    2016-05-11

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

    IV55797

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

Fix information

  • Fixed component name

    AIX V7.1

  • Fixed component ID

    5765H4000

Applicable component levels

  • R710 PSY U865329

       UP15/01/19 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV64187

Modified date: 11 May 2016