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Q276453: Dynamically Defined Dependent LU Support for Printer LUs

Article: Q276453
Product(s): Microsoft SNA Server
Version(s): 2.11 (all SP),3.0 (all SP),4.0,4.0 SP1,4.0 SP2,4.0 SP3
Operating System(s): 
Keyword(s): kbDSupport kbsna211sp1 kbsna211sp2 kbsna300sp1 kbsna300sp2 kbsna300sp3 kbsna300sp4 sna4
Last Modified: 11-JUN-2002

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The information in this article applies to:

- Microsoft SNA Server, versions 2.11 SP1, 2.11 SP2, 3.0 SP1, 3.0 SP2, 3.0 SP3, 3.0 SP4, 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3 
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IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

  Q256986 Description of the Microsoft Windows Registry

SUMMARY
=======

Microsoft SNA Server versions 2.11 and later provide support for Dynamically
Defined Dependent Logical Units (DDDLUs) for 3270 display LUs. DDDLU support for
LUA LUs was first added in SNA Server 3.0 Service Pack 1 (SP1). However, DDDLU
support for 3270 Printer LUs is not provided in SNA Server.

For additional information about support for DDDLUs in Microsoft SNA Server,
click the article numbers below to view the articles in the Microsoft Knowledge
Base:

  Q161492 LU Session Activation Using Dynamically Defined Dependent LUs

  Q164592 Dynamically Defined Dependent LU Support for LUA LUs

For additional information about the latest service pack for SNA Server 4.0,
click the article number below to view the article in the Microsoft Knowledge
Base:

  Q215838 How to Obtain the Latest SNA Server Version 4.0 Service Pack

MORE INFORMATION
================

DDDLU support for 3270 Printer LUs is available after you apply the update to
SNA Server 4.0. By default, DDDLU support for 3270 Printer LUs is disabled. To
enable this support, the following registry entry must be set to specify the
model name that is sent to the host in an Network Management Vector Table (NMVT)
request, in order to solicit an Activate LU (ACTLU) or Deactivate LU (DACTLU)
for 3270 Printer LUs.

WARNING: If you use Registry Editor incorrectly, you may cause serious problems
that may require you to reinstall your operating system. Microsoft cannot
guarantee that you can solve problems that result from using Registry Editor
incorrectly. Use Registry Editor at your own risk.

1. Start Registry Editor (Regedt32.exe).

2. Locate the following key in the registry:

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SnaServr\Parameters

  NOTE: The above registry key is one path; it has been wrapped for readability.

3. On the Edit menu, click Add Value, and then add the following registry value:

  Value Name: PrinterDDDLUModel
  Data Type: REG_SZ
  Value: <Model Name>

4. Quit Registry Editor.

Model Name needs to be replaced with the model name of the printer LU that SNA
Server will send to the host in the NMVT request to activate/deactivate the
printer LU. These values are defined on the host. Typical values may be 3270SCS
for LU1 printers or 3270DSC for LU3 printers. The model name string can be up to
seven characters long. The SNA Server pads any strings that are less than seven
characters with spaces, or truncates any strings that are longer than seven
characters to ensure that only seven characters are sent to the host as part of
the NMVT requests.

NOTE: This support for DDDLUs is limited to either LU1 printer LUs or LU3 printer
LUs because the PrinterDDDLUModel registry entry is global in nature and applies
to all dynamically created 3270 printer LUs.



Additional query words: Snaservr sp1 sp2 sp3 sp4

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Keywords          : kbDSupport kbsna211sp1 kbsna211sp2 kbsna300sp1 kbsna300sp2 kbsna300sp3 kbsna300sp4 sna4 kbsna400sp1 kbsna400sp2 kbsna400sp3 
Technology        : kbAudDeveloper kbSNAServSearch kbSNAServ400 kbSNAServ211SP1 kbSNAServ211SP2 kbSNAServ300SP3 kbSNAServ300SP1 kbSNAServ400SP1 kbSNAServ400SP2 kbSNAServ400SP3 kbSNAServ300SP2 kbSNAServ300SP4
Version           : :2.11 (all SP),3.0 (all SP),4.0,4.0 SP1,4.0 SP2,4.0 SP3
Issue type        : kbinfo

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