CSNW & GSNW Won't Display NetWare Servers via a SAP Seed Server (166842)


The information in this article applies to:

  • Microsoft Windows NT Workstation 3.51
  • Microsoft Windows NT Workstation 4.0
  • Microsoft Windows NT Server 3.51
  • Microsoft Windows NT Server 4.0
This article was previously published under Q166842

SYMPTOMS

A computer running Windows NT cannot list or attach to some Novell NetWare servers, although Windows 95-based clients operate successfully.

CAUSE

Client Services for NetWare (CSNW) and Gateway Services for NetWare (GSNW) attach to a default or preferred server. The client then queries that server for a list of other servers. Windows NT CSNW is only able to connect to servers that are included in its default or preferred server's service advertising process (SAP) table. If the segment that the default server is on is not routed or bridged to the other segments, the server is unaware of the servers on those segments. To see what servers the default server knows about, type DISPLAY SERVERS at the NetWare console.

MORE INFORMATION

A network configuration may include intermediate devices such as a bridge that filters IPX SAP broadcasts or routers that are not configured to forward SAP broadcasts. One NetWare "seed" server can be located on each side of the router. SAP information is only forwarded to designated "seed" servers.

When a Windows 95 client attaches to one of the "seed" servers, the SAP queries are performed against the bindery of the server being attached to in order to obtain the complete SAP table. The Windows 95 redirector performs this operation successfully through the Map command run from an MS- DOS prompt. This is not supported under Windows NT because CSNW uses the preferred server for all SAP queries.

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

ARTICLE-ID: 151236
TITLE : CSNW/GSNW Will Only Show Servers on One Network

RESOLUTION

Log off and log back on, selecting the desired preferred server.

A command line option is now available to allow CSNW to obtain the SAP table from a "seed" server. This is only supported with the Net use command. Also, this capability is only available from the command line and is not supported through API or through any GUI applications such as the Explorer. The NetWare Map command does not support this CSNW capability.

To provide support for this new option, first apply the updated Nwrdr.sys file mentioned below and then perform the following steps:

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 the Registry Editor (Regedt32.exe).
  2. From the HKEY_LOCAL_MACHINE subtree, go to the following key:
    \System\CurrentControlSet\Services\NWRDR\paramete
  3. From the Edit menu, click Add Value.
  4. Add the following: 
          Value Name: AllowSeedServerRedirection
      Data Type:  REG_DWORD
      Data: 0x1 (Hex)
  5. Enable the AllowSeedServerRedirection on CSNW; Default is Disabled (0x0)

Command Line Usage

The following command syntax can be used to access the seed server SAP table:

net use * \\server(bindery_server)\volume

Where server = the name of a Netware file server containing Volume and bindery_server = the name of the NetWare seed server.

Net use drivespec /d must be used to disconnect the connection.

Note: This command line option is only intended to provide support through the net use command. All other NetWare API interoperability is not supported. The Map command should not be used to remove the connection. Support for this command option from GUI applications including Explorer is not included.

For example:

Map lists the seed server connection 
Drives A,B,C,D,E,F,G,.... map to a local disk.
Drive T: = NetwareServer\PUB: \ 
....
Drive X: = NetwareServerName(SeedServerName)\SYS: \

net use lists the "seed" server connection: 
Status       Local  Remote                    Network</H3>
Disconnected F:     \\jsbach\public           Microsoft Windows Network
             V:     \\bullet\pub              NetWare or Compatible Network
             W:     \\bullet(nw41_essbp)\sys  NetWare or Compatible Network

Whoami will return the following error upon completing. 
User ID:    UserName
Server:     NetwareServerName   NetWare 4.10
Connection: 3 (Bindery)
Login time: Wednesday 3/05/97 9:47:30 am
....
WHOAMI-4.1-230: An error occurred during WHOAMI's attempt to get the connection status.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 4.0 Service Pack 2. This problem was corrected in the latest Microsoft Windows NT 4.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K


Microsoft has confirmed this to be a problem in Windows NT version 3.51. We are researching this problem and will post additional information here in the Microsoft Knowledge Base as it becomes available.
Modification Type:MajorLast Reviewed:8/9/2001
Keywords:kbbug KB166842
©2002 Microsoft Corporation. All rights reserved.