Protected Mode NetBEUI Causes TCP/IP Failure

ID: Q111979

The information in this article applies to:

Microsoft LAN Manager, version 2.2

SYMPTOMS

Using an ICL EtherTeam 16i adapter and the protected mode redirector on Windows for Workgroups 3.11 can cause the LAN Manager 2.2b TCP/IP (TCP 1.0a) to fail under certain circumstances.

After starting Windows for Workgroups, you should be able to ping in a command window. If you are using protected mode NetBEUI, however, and start a large software package (such as Excel) over the net, an attempt to ping in a window fails with a DGN0209 error. NetBEUI works, but TCP/IP fails.

CAUSE

If the MAC driver for the ICL card fails to copy the frame on TransferData (more likely while loading Excel from the server over NetBEUI), the TCP/IP driver fails to release the buffer, resulting in a memory leak that eventually makes the TCP/IP stack non-functional.

RESOLUTION

Contact Microsoft Product Support Services for the fix for LAN Manager MS-DOS TCPTSR.EXE in CSD00.083. It is not included in LAN Manager 2.2b Service Pack.

Additional query words: wfw wfwg 2.20b 2.2b

Keywords :
Version : :2.2
Platform :
Issue type :