VLCBK Back to Index page
 
Prolog 
Control Block Contents 
   VLCBK DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  VLCBK Prolog Top of page
  
 NAME       : HCPVLCBK
 DESCRIPTION: VLAN Counter Structure
 DSECT      : VLCBK
 FUNCTION   :
              Each VLCBK represents a list of VLAN counters use to
              track the bytes, frames transferred and discarded frames
              per VLAN ID for a given NIC adapter.  These counters are
              returned with SNMP and Diag x'26C'.
              The VLCBK structure is fixed length.
 LOCATED BY -
   NICCTRVL  - Points to a Multi-Level (MLT) Table of
               of L:VLCBKs indexed by VLAN ID.
 CREATED BY :
              During data transfer when SET VLAN_counters ON is
              specified for a VLAN AWARE virtual switch.
 DELETED BY :
              DETACH NIC - NICBK destruction
 RELOCATION CONSIDERATIONS : None
 
 
  VLCBK Control Block Content Top of page
  




 VLCBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      VLCBK          VLAN Counter Structure
0000    0 Address      4 VLCNICBK       Pointer to owning NICBK
0004    4 Signed       2 *              Reserved for Future IBM Use save
0006    6 Signed       2 VLCVLAN        VLAN ID
      VLAN Counters
      NOTES      : Counters must remain contiguous in storage as they
            are currently defined.  Only insert new fields after
            the counters.
          00000000       VLCRXF         VLCRX-VLCCTR Offset to (RX) Frame
                                        Count
          00000008       VLCTXF         VLCTX-VLCCTR Offset to (TX) Frame
                                        Count
          00000010       VLCRXDF        VLCRXDSC-VLCCTR Offset to (RX)
                                        Discard Frame Count
          00000018       VLCTXDF        VLCTXDSC-VLCCTR Offset to (TX)
                                        Discard Frame Count
          00000020       VLCRXBC        VLCRXBYT-VLCCTR Offset to (RX)
                                        Byte Count
          00000028       VLCTXBC        VLCTXBYT-VLCCTR Offset to (TX)
                                        Byte Count
          00000020       VLCBYTES       VLCRXBYT-VLCRX Offset from a (RX)
                                        or (TX) Frame Count to its
                                        corresponding Byte Counter
0008    8 Bitstring   48 VLCCTR (0)     All counters
0008    8 Dbl-Word     8 VLCRX          Count of frames IN on this VLAN
0010   16 Dbl-Word     8 VLCTX          Count of frames OUT on this VLAN
0018   24 Dbl-Word     8 VLCRXDSC       Frames discarded on INPUT
0020   32 Dbl-Word     8 VLCTXDSC       Frames discarded on OUTPUT
0028   40 Dbl-Word     8 VLCRXBYT       (RX) Incoming Byte Count
0030   48 Dbl-Word     8 VLCTXBYT       (TX) Outbound Byte Count
          00000038       VLCCTRLN       *-VLCBK Length of structure
          00000007       VLCBKSZ        (*-VLCBK+7)/8 Length in
                                        doublewords
 
 
  VLCBK Storage Layout Top of page
  
          
*** VLCBK - VLAN Counter Structure
*
*     +---------------------------+-------------+-------------+
*   0 |         VLCNICBK          |/////////////|  VLCVLAN    |
*     +---------------------------+-------------+-------------+
*   8 |                        VLCRX                          |
*     +-------------------------------------------------------+
*  10 |                        VLCTX                          |
*     +-------------------------------------------------------+
*  18 |                       VLCRXDSC                        |
*     +-------------------------------------------------------+
*  20 |                       VLCTXDSC                        |
*     +-------------------------------------------------------+
*  28 |                       VLCRXBYT                        |
*     +-------------------------------------------------------+
*  30 |                       VLCTXBYT                        |
*     +-------------------------------------------------------+
*  38
*
*** VLCBK - VLAN Counter Structure
 
 
  VLCBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
VLCBKSZ        0030 00000007
VLCBYTES       0006 00000020
VLCCTR         0008
VLCCTRLN       0030 00000038
VLCNICBK       0000
VLCRX          0008
VLCRXBC        0006 00000020
VLCRXBYT       0028
VLCRXDF        0006 00000010
VLCRXDSC       0018
VLCRXF         0006 00000000
VLCTX          0010
VLCTXBC        0006 00000028
VLCTXBYT       0030
VLCTXDF        0006 00000018
VLCTXDSC       0020
VLCTXF         0006 00000008
VLCVLAN        0006
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:57:40 EDT.
Copyright IBM Corporation, 1990, 2022