Communication Through FDDI to MAC Address Fails (117414)


The information in this article applies to:

  • Microsoft Windows NT Server 3.1
  • Microsoft Windows NT Workstation 3.1
  • Microsoft Windows NT Advanced Server 3.1
This article was previously published under Q117414

SYMPTOMS

When Windows NT tries to communicate through an FDDI card to a computer with a MAC address that has the MSB set, the two computers are not able to communicate.

CAUSE

The high bit of the MAC address is being cleared in the response from the Windows NT computer. If Windows NT receives a packet that has a source MAC address of AA0000000001, it responds to MAC address 2A0000000001 (the MSB of the MAC address has been cleared).

STATUS

Microsoft has confirmed this to be a problem in Windows NT and Windows NT Advanced Server version 3.1. This problem has been corrected in Windows NT Workstation and Windows NT Server version 3.5. This problem has also been corrected in the latest U.S. Service Pack for Windows NT and Windows NT Advanced Server version 3.1. 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
Modification Type:MajorLast Reviewed:11/20/2003
Keywords:kbnetwork KB117414
©2003 Microsoft Corporation. All rights reserved.