LLNBK Back to Index page
 
Prolog 
Control Block Contents 
   LLNBK 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.


  LLNBK Prolog Top of page
  
 NAME       : HCPLLNBK
 DESCRIPTION: Link Layer (MAC) Node
 DSECT      : LLNBK
 FUNCTION   :
              Each LLNBK represents a Link Layer MAC address
              associated with a specific Network Interface Device
              (NIDBK).  Link Layer functions maintain the list of
              MAC Address (LLNBK) entries on each device.
 LOCATED BY -
   NIDMALST - Device MAC Address List.
 CREATED BY :
              Link Layer functions in module HCPLLN.
 DELETED BY :
              Link Layer functions in module HCPLLN.
 RELOCATION CONSIDERATIONS : None
 
 
  LLNBK Control Block Content Top of page
  




 LLNBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      LLNBK          Link Layer (MAC) Node
      Link Layer (MAC) Node attributes.
0000    0 Character    1 LLNTYPE        LLNBK Type
          000000E4       LLNUCMAC       C'U' LLNUCMAC Unicast
                                        (Individual) MAC addr
          000000D4       LLNMCMAC       C'M' LLNMCMAC Multicast (Group)
                                        MAC addr
          000000C2       LLNBCMAC       C'B' LLNBCMAC Broadcast (Group)
                                        MAC addr
      Link Layer MAC Address flags.
0001    1 Bitstring    1 LLNFLAGS       LLNBK Flags
          1... ....      LLNDEACT       X'80' LLNDEACT DEACTIVATED entry.
                                        This entry is not in the
                                        LANIDTBL.
          .1.. ....      LLNLOCAL       X'40' LLNLOCAL LOCAL entry.
      HiperSockets Logical Guest processing flag
      Serialized :
         (BPBCFGLK)  Guest Port Configuration Lock - must be
                     HELD EXCLUSIVE when updating the LLNFLAG2
0002    2 Bitstring    1 LLNFLAG2       Additional LLNBK Flags
          1... ....      LLNLG3DP       X'80' LLNLG3DP Used for resolving
                                        CHSC x'3D' with HiperSockets
                                        Logical Guests
0003    3 Bitstring    1 *              Reserved for IBM use
      Link to Device Interface.
0004    4 Address      4 LLNNIDBK       Pointer to NIDBK (owner)
      Linkage for Device MAC Table chain.
0008    8 Address      4 LLNFPNT        Pointer to next Device LLNBK
000C   12 Address      4 LLNBPNT        Pointer to previous Device LLNBK
      Link Layer Node ID (MAC address).
0010   16 Bitstring    2 *              Reserved
0012   18 Bitstring    6 LLNMAC         MAC address for this node
      End of the LLNBK.
0018   24 Dbl-Word     8 LLN$END (0)    End of the LLNBK structure
          00000018       LLNBKLN        *-LLNBK Length of LLNBK in bytes
          00000003       LLNBKSZ        (*-LLNBK+7)/8 Size of LLNBK in
                                        doublewords
 
 
  LLNBK Storage Layout Top of page
  
          
*** LLNBK - Link Layer (MAC) Node
*
*     +------+------+------+------+---------------------------+
*   0 |:TYPE |:FLAGS|:FLAG2|//////|         LLNNIDBK          |
*     +------+------+------+------+---------------------------+
*   8 |         LLNFPNT           |         LLNBPNT           |
*     +-------------+-------------+---------------------------+
*  10 |/////////////|                 LLNMAC                  |
*     +-------------+-----------------------------------------+
*
*** LLNBK - Link Layer (MAC) Node
 
 
  LLNBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
LLN$END        0018
LLNBCMAC       0000 000000C2
LLNBKLN        0018 00000018
LLNBKSZ        0018 00000003
LLNBPNT        000C
LLNDEACT       0001 80
LLNFLAGS       0001
LLNFLAG2       0002
LLNFPNT        0008
LLNLG3DP       0002 80
LLNLOCAL       0001 40
LLNMAC         0012
LLNMCMAC       0000 000000D4
LLNNIDBK       0004
LLNTYPE        0000
LLNUCMAC       0000 000000E4
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:52:12 EDT.
Copyright IBM Corporation, 1990, 2022