El59x Driver Shows Only Inbound Traffic with Network Monitor

• Microsoft Windows NT Workstation version 4.0
• Microsoft Windows NT Server version 4.0
• Microsoft Windows NT Workstation version 4.0 Service Pack 3
• Microsoft Windows NT Server version 4.0 Service Pack 3

SYMPTOMS

When you are using Network Monitor with a 3Com 3C59X adapter, Network Monitor may capture only the data sent to the computer using the adapter. Data sent from the computer is never displayed in Network Monitor. This occurs with the El59x.sys network card driver that ships with Windows NT version 4.0 and with Windows NT version 4.0 Service Pack 3.

RESOLUTION

Perform the following steps to resolve this problem:

1. Obtain the latest version of El59x.sys from 3Com.



2. Copy the new version of this driver over the previous version in the \%SystemRoot%\System32\Drivers folder.



3. Restart your computer.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 4.0 and Windows NT version 4.0 Service Pack 3. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Additional query words: 3Com netmon

Keywords : kb3rdparty kbhw kbnetwork kbbug4.00 kbbug4.00.sp3 NTSrvWkst
Version : WinNT:4.0
Platform : winnt
Issue type : kbbug