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Low level vs High level ACK

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  • November 3, 2005 at 8:18 pm #48122
    Rentian Huang
    Participant

      Greetings Cloverleafers!!!

      I am not clear of the difference btw low/high level ack. If I got this reply in my ob thread, is it a High level application ack? Then what’s the low level one? Any diff btw them?

      Thanks!

      Sam

      msg: 0x30001828

        msgType           : REPLY

        msgClass          : PROTOCOL

        msgState          : Unknown: 0 (0)

        msgPriority       : 5120

        msgRecoveryDbState: 2

        msgFlags          : 0x8002

        msgMid            : [0.0.8096930]

        msgSrcMid         : midNULL

        msgSrcMidGroup    : midNULL

        msgOrigSrcThread  : to_easyaccess_out

        msgOrigDestThread : star_ord_res_in

        msgSrcThread      : to_easyaccess_out

        msgDestThread     : star_ord_res_in

        msgXlateThread    :

        msgSkipXlate      : 0

        msgSepChars       :

        msgNumRetries     : 0

        msgGroupId        : 0

        msgDriverControl  :

        msgRecordFormat   :

        msgRoutes         :

        msgUserData       :

        msgStaticIsDirty  : 1

        msgVariableIsDirty: 1

        msgTimeStartIb    : 1131048927.928

        msgTimeStartOb    : 1131048911.817

        msgTimeCurQueStart: 0.000

        msgTimeTotalQue   : 0.000

        msgTimeRecovery   : 1131048911.817

        msgEoConfig       : 0x0

        msgData (BO)      : 0x300018d4

        message           : ‘MSH|^~&|HBOC|H|EasyAccess|H|20051103151300||ACK|43523|P|2.3|43523||ALx0dMSA|AA|43523x0d’

      _________________

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      • November 4, 2005 at 4:30 pm #57718
        garry r fisher
        Participant

          Hi,

          I can never remember the details but the MSH/MSA ACK is high level in that it is in either the application or session level of the OSI model. A low level ACK is in the lower level of the OSI model (transport?) so you don’t normally see this in the EO output.

          Quick question to other Clovertechers – can EO Config be set to trace at this lower level

          Regards

          Garry

        • November 4, 2005 at 6:07 pm #57719
          Jim Kosloskey
          Participant

            I do not believe EO can be see the low level on certainly TCP/IP nor SNA.  There are operating system level traces which can be used.

            But let me say that I have been able to resolve most issues regarding protocols I encounter with what I see in the logs.

            The few times an iptrace or sna trace were required, the OS and network folks needed to be involved and I just let them have at it. In most of those cases, the theory I developed from information in Cloverleaf’s logs were simply proved to be correct by the other traces.

            Jim Kosloskey

            email: jim.kosloskey@jim-kosloskey.com 29+ years Cloverleaf, 59 years IT - old fart.

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