z/OS Communications Server: SNA Diagnosis Vol 1, Techniques and Procedures
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SIBCHECK

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

SIBCHECK analyzes important fields and relevant status flags in an SIB and related control blocks. The following control blocks are analyzed:
  • DLU cross-network extension (SIBX)
  • OLU cross-network extension (SIBX)
  • PLU resource extension (SIBRX)
  • SIB base
  • SIB initiation extension (SIBIX)
  • SLU resource extension (SIBRX)
  • SIB termination extension
SIBCHECK determines:
  • Alias resource names and network IDs
  • Configuration (cross-domain, cross-network, back-to-back, and so on)
  • Destination logical unit
  • GWNCP names
  • Initiating logical unit
  • Network addresses
  • Originating logical unit
  • Primary logical unit
  • RDTE address
  • Real resource names and network IDs
  • Resource type (APPL, LU, CDRSC, and so on)
  • Secondary logical unit

For each status bit in the SIB and related control blocks, the bit name, its value, and its meaning (from ) are listed.

Fields in the SIB that contain addresses are checked (such as SIBTV35P, the CV35 pointer, or SIBTNOTP, the pointer to NOTIFY RU). If these fields contain a nonzero address, the address and description of the field are also displayed.

Note: The SIBBTIME value is displayed in the format of coordinated universal time (formerly known as Greenwich Mean Time).

Operands

You must specify one address or one symbol.
Address
Enter 1–8 hexadecimal digits in the form X'x…' for the address of the SIB to be analyzed. If the address is fewer than 8 digits, it is padded on the left with zeros.
IPCS symbol
Enter 1–31 alphanumeric characters for an IPCS symbol name that has been previously equated with the address of the SIB to be analyzed. Do not include a period.

Under IPCS, the symbol X represents the address currently being displayed. If the current address is an SIB, this symbol may be used to refer to it.

Use the following syntax as an alternative to the panel interface.

Syntax

Read syntax diagramSkip visual syntax diagram
>>-SIBCHECK--+- --ADDR--(--address--)--+-----------------------><
             '- --SYMBOL--(--symbol--)-'   

Sample output

SIBCHECK ADDR(X'02CCA020')
 
                        SIBCHECK Analysis
                                CDRM: VTAM
                               NetID: NETA
                     Network address: 00000001 0001
                         SIB address: 02CCA020
          OLU|PLU                             DLU|SLU
Name (from RDTE): APPCAP05           Name (from RDTE): APPCAP06
    RDTE address: 02CC7B7C               RDTE address: 02CC7CD8
       RDTE type: APPL                      RDTE type: APPL
     Owning CDRM: VTAM                    Owning CDRM: VTAM
           NetID: NETA                          NetID: NETA
      Alias name: APPCAP05                 Alias name: APPCAP06
     Alias netid: NETA                    Alias netid: NETA
   Adjacent SSCP: ........              Adjacent SSCP: ........
 Network address: 00000001 000F       Network address: 00000001 0012
SIBFSMIN: F4 = SIBIFSST - Pending generic session start state
SIBFSMTM: 00 = SIBTFSIS - Initial state
 
                        Analyze SIB Base
              Original PCID for session: D5376DF4EA88AAB0
          Timestamp from SIB (SIBBTIME): A94FBAF5FD484FF1
         Converted Timestamp (SIBBTIME): 08/13/92 12:36:29.816279
  Primary SIB queue (SIBBPRIQ) elements: 0
Secondary SIB queue (SIBBSECQ) elements: 0
SIBBAUTO = 0 - This is not an AUTOLOGON (LOGAPPL) session
SIBBIOLU = 1 - OLU is the initiating LU
⋮
 Analysis of resource extension for DLU|SLU APPCAP06 at address 02CCA140
SIBRNETC = 10 = SIBRNTS  - Network configuration: Same domain
SIBRCDTC = 0 - Session has not been associated with the CDTAKEDOWN complete
               RU for the CDRM specified in SIBRADJN
⋮
Analysis of SIB Initiation Extension at address 02C6D020
Routing FSM (SIBIRFSM): 20
Failing RU (SIBIFRU): 00000000
Failing reason (SIBIFRSN): 00
Failure status (SIBIFST): 00
SIBICDR  = 0 - CDINIT DQ is not waiting on any I/O
SIBIDLUA = 0 - The DLU network ID is not assumed
⋮
Analysis of SIB Termination Extension
    RID for session takedown (SIBTTRID): 0000000000000000
                 Process RID (SIBTTRID): 0000000000000000
SIBTDSUS = 0 - Session was not suspended for duplicate session
SIBTORIG = 0 - SIBUSER - Termination originator is network user
⋮
Cross-network extension does not exist for OLU|PLU APPCAP05
 
Cross-network extension does not exist for DLU|SLU APPCAP06

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