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 7.2.0 Last updated on 24 Jun 2020 at 09:28:56 EDT.
Copyright IBM Corporation, 1990, 2020