z/OS Communications Server: SNA Diagnosis Vol 1, Techniques and Procedures
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Recording NMVT alerts in LOGREC

z/OS Communications Server: SNA Diagnosis Vol 1, Techniques and Procedures
GC27-3667-00

A network management vector transport (NMVT) is an SNA request unit (RU) that contains solicited or unsolicited data, such as line statistics and generic alerts. LOGREC is a host data set that contains records of various types of system failures, both hardware and software.

VTAM® records all unsolicited NMVT alerts and all NMVT alerts from local area networks in LOGREC as miscellaneous data records (MDRs). If you have the NetView® program, VTAM also forwards the NMVT alerts to the NetView hardware monitor for recording. The NetView program interprets the error information for its operator panels. To determine what document contains more information on NetView's presentation of generic alerts, see Table 1. For more information on generic alerts generated by First Failure Support Technology™ (FFST™), refer to z/OS Communications Server: SNA Diagnosis Vol 2, FFST Dumps and the VIT.

VTAM identifies and records an NMVT alert as follows:
  • Each NMVT has an SNA network services (NS) header of X'41038D'.
  • Each NMVT that is an alert has a management services (MS) major vector of X'0000'.
  • To determine the type of device that sent the NMVT alert, VTAM checks the product ID subvector (X'11') of the NMVT for the hardware machine type. Each type of device has its own unique machine type; for example, each NMVT alert that comes from a 3745 has a machine type of C'3745'.
  • VTAM records the NMVT alert in LOGREC as an MDR (type=X'91') with a device type of NMVT (X'30').

    You can format and print NMVT alerts from LOGREC using the Environmental Record Editing and Printing program (EREP). See Table 1 to determine what document contains information on how to use EREP.

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