SNMP Returns Corrupt MAC Address

ID: Q139841

The information in this article applies to:

Microsoft Windows NT Workstation version 3.51

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 nttcp kbbug3.51 NTSrvWkst
Version : 3.51
Platform : winnt
Issue type :