Low level vs High level ACK

[Rentian Huang]

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’

_________________

Topic

[garry r fisher]

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

[Jim Kosloskey]

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.

[Author]

Replies