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Q139841: SNMP Returns Corrupt MAC Address

Article: Q139841
Product(s): Microsoft Windows NT
Version(s): 3.51
Operating System(s): 
Keyword(s): kbnetwork
Last Modified: 08-AUG-2001

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The information in this article applies to:

- Microsoft Windows NT Workstation version 3.51 
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SYMPTOMS
========

SNMP on Windows NT Workstation return a corrupt value when the Interface
Object's MAC address is read. SNMP returns four or five bytes of the six byte
address.

MORE INFORMATION
================

The following command line entries will reproduce the problem. Notice that the
Windows NT server returns a correct value for ifPhysAddress.2 while the two
workstations return corrupt information.

  C:\users\default>snmputil walk <computernmae> public .1.3.6.1.2

Windows NT Server 3.51 Service Pack 2:

  Variable = interfaces.ifTable.ifEntry.ifDescr.2
  Value = OCTET STRING - Intel EtherExpress PRO Adapter

  Variable = interfaces.ifTable.ifEntry.ifPhysAddress.2
  Value = OCTET STRING -
  <0x0><0xaa><0x0><0xb5><0x1a><0x95>

Windows NT Workstation 3.51 Service Pack 1:

  Variable = interfaces.ifTable.ifEntry.ifDescr.2
  Value = OCTET STRING - Intel EtherExpress 16 Miniport/

  Variable = interfaces.ifTable.ifEntry.ifPhysAddress.2
  Value = OCTET STRING - <0x0><0xaa><0x0>7?<0xce>

Windows NT Workstation 3.51 Service Pack 2:

  Variable = interfaces.ifTable.ifEntry.ifDescr.4
  Value = OCTET STRING - Intel EtherExpress PRO Adapter

  Variable = interfaces.ifTable.ifEntry.ifPhysAddress.2
  Value = OCTET STRING -
  <0x0><0xaa><0x0>`<0xd3><0xce>

STATUS
======

Microsoft has confirmed this to be a problem in Windows NT Workstation version
3.51 We are researching this problem and will post new information here in the
Microsoft Knowledge Base as it becomes available.

Additional query words: prodnt tcpip sp1 sp2 media access control

======================================================================
Keywords          : kbnetwork 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNT351search kbWinNTW351search kbWinNTW351
Version           : 3.51

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