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Q243468: Default Gateway Changes Unexpectedly on Token Ring Network

Article: Q243468
Product(s): Microsoft Windows NT
Version(s): winnt:4.0
Operating System(s): 
Keyword(s): kbWinNT400PreSP7Fix
Last Modified: 08-MAY-2002

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The information in this article applies to:

- Microsoft Windows NT Workstation version 4.0 
- Microsoft Windows NT Server version 4.0 
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SYMPTOMS
========

On a source-routed Token Ring network, your Windows NT-based computer may
experience delays or loss of connectivity when you attempt to communicate with
other hosts using TCP/IP.

Investigation using Ipconfig or the route print command reveals that the IP
address of your default gateway has changed to the address of your local host.

CAUSE
=====

This behavior can occur if TCP/IP receives an invalid ARP request by way of a
new source route in which the sender's protocol address field in the ARP packet
is 0.0.0.0.


RESOLUTION
==========

A supported fix is now available from Microsoft, but it is only intended to
correct the problem described in this article and should be applied only to
systems experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the
fix. For a complete list of Microsoft Product Support Services phone numbers and
information on support costs, please go to the following address on the World
Wide Web:

  http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are normally incurred for support calls may
be canceled, if a Microsoft Support Professional determines that a specific
update will resolve your problem. Normal support costs will apply to additional
support questions and issues that do not qualify for the specific update in
question.

The English-language version of this fix should have the following file
attributes or later:

  Date      Time                 Size    File name     Platform
  -------------------------------------------------------------
  10/07/99  21:26              152,400   Tcpip.sys     x86
  10/07/99  21:24              276,336   Tcpip.sys     Alpha



STATUS
======

Microsoft has confirmed this to be a problem in the Microsoft products that are
listed at the beginning of this article.

Additional query words:

======================================================================
Keywords          : kbWinNT400PreSP7Fix 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400
Version           : winnt:4.0
Hardware          : ALPHA x86
Issue type        : kbbug
Solution Type     : kbfix

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