Unable to Open or Copy Files from a NetWare Server on FDDI Ring

 Last reviewed: March 25, 1997
Article ID: Q134385

The information in this article applies to:
  • Microsoft Windows NT Workstation version 3.5 with Service Pack 2
  • Microsoft Windows NT Server version 3.5 with Service Pack 2
  • Microsoft Windows NT Workstation versions 3.51 and 4.0
  • Microsoft Windows NT Server versions 3.51 and 4.0

SYMPTOMS

On your computer running Windows NT, you can view files on a Novell NetWare server from File Manager, but you cannot open these files or copy them to a local drive.

The Event Viewer shows the following error: 

   Event Id 8007: The Microsoft client service for Netware redirector has
   timed out a request to <NetWare_server_name>.
These symptoms occur when you use Windows NT on an Ethernet network segment with Client Services for NetWare (CSNW) or Gateway Services for NetWare (GSNW) installed, and attach to a Novell NetWare server connected to an FDDI ring.

WORKAROUND

To work around this problem:

  • Decrease the packet size from 4202 to 1514 on the NetWare server.

    NOTE: This solution negatively impacts the performance of the NetWare server on the FDDI ring.

in 

   -or-
  • Set DefaultMaxPacketSize to 1012. To do this:

    WARNING: Using Registry Editor incorrectly can cause serious, system- wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk.

    1. Run Registry Editor (REGEDT32.EXE).

    2. From the HKEY_LOCAL_MACHINE subtree, go to the following key: 

          \SYSTEM\CURRENTCONTROLSET\SERVICES\NWRDR\PARAMETERS

    3. Add the following value: 

           DefaultMaxPacketSize:REG_DWORD: 1012  (decimal)

    For more information please see the following article in the Microsoft Knowledge Base: 

       ARTICLE-ID: Q150426
   TITLE: Ethernet Packet Size Incorrectly Determined w/ Packet Burst Off

    • Additional query words: prodnt
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    Keywords : kb3rdparty kbbug3.51 kbinterop ntinterop ntnetserv
    Version : 3.50.SP2 3.51 4.0
    Platform : WinNT

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    Last reviewed: March 25, 1997
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