Cannot Use IPX/SPX with NetBIOS Support with Dial-Up Networking

 Last reviewed: October 14, 1997
Article ID: Q175055
The information in this article applies to:
  • Microsoft Windows 95
  • Microsoft Windows 95 OEM Service Release versions 1, 2, 2.1

SYMPTOMS

When Windows 95 is configured to use the IPX/SPX-compatible protocol with NetBIOS support enabled to communicate over a Dial-Up Networking connection, you may receive an error message indicating that the NetBIOS name is already in use if you use a program that uses NetBIOS over IPX/SPX. A Dial-Up Networking connection that uses a different protocol (such as TCP/IP or NetBEUI) may work correctly.

CAUSE

This problem may occur if the Dial-Up Networking point-to-point (PPP) server is configured to forward Type 20 IPX packets.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Windows 95 and OEM Service Release 2 (OSR2). An update to address this problem is now available, but is not fully regression tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft does not recommend implementing this update at this time. Contact Microsoft Technical Support for additional information about the availability of this update.

MORE INFORMATION

If the PPP server forwards Type 20 (NetBIOS) IPX packets, it returns the client's NetBIOS AddName packet back to the client who sent it. The Windows 95 IPX NetBIOS protocol (NWNBLink) does not recognize the packet as having originated from itself, and interprets the response as indicating that the name is already is use. 

Keywords          : osr1 osr2 win95 kberrmsg kbtool kbfixlist
Version           : WINDOWS:95
Platform          : WINDOWS

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Last reviewed: October 14, 1997
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