Default Gateway Changes Unexpectedly on Token Ring Network

ID: Q243468

The information in this article applies to:

Microsoft Windows NT Workstation version 4.0
Microsoft Windows NT Server version 4.0

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 that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Windows NT 4.0 service pack that contains this fix.

To resolve this problem immediately, 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://www.microsoft.com/support/supportnet/overview/overview.asp

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 listed at the beginning of this article.

Additional query words:

Keywords : kbbug4.00 kbfix4.00
Version : winnt:4.0
Platform : winnt
Issue type : kbbug