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PM66054: SIP REQUEST THAT EXCEEDS THE MTU VALUE MIGHT NOT SWITCH FROM UDP TO TCP.

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APAR status

  • Closed as program error.

Error description

  • SIP request that exceeds the MTU value might not
    switch from UDP to TCP.
    

Local fix

  • N/A
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server V8.0 and V8.5 Session Initiation     *
    *                  Protocol (SIP) Container                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: Sending a large SIP request that        *
    *                      exceeds the MTU value does not cause    *
    *                      a transport switch from UDP to TCP.     *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    An exception is being thrown when a package exceeds the MTU
    value and a certain custom property
    ("javax.sip.strict.outbound.local.port") is false which is its
    default value. This flag does not allow to send a package over
    a listening point that is different from the one mentioned in
    the SIP message. In our case the "if" statement that checks
    the custom property value was supposed to throw the exception
    on "javax.sip.strict.outbound.local.port" having a true value
    and not false.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PM66054

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-06-04

  • Closed date

    2012-06-29

  • Last modified date

    2012-07-30

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

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

    PM67724

Fix information

  • Fixed component name

    WEBS APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels

  • R800 PSY

       UP

  • R850 PSY

       UP

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Document Information

Modified date:
30 July 2012