JSI Tip 5212. MS-DOS client copies files to Windows 2000 very slowly over TCP/IP?

You experience poor performance when copying files on a TCP/IP Ethernet network from a MS-DOS client to a Windows 2000 computer?

The MS-DOS client attempts to fill the Windows 2000 receive buffer, but the MS-DOS real mode network adapter driver can't keep up, causing packets to be dropped.

The Windows 2000 computer uses a 17KB TCP receive window size by default.

To workaround this issue, you can set the Windows 2000 TcpWindowSize, a REG_DWORD data type, at
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\tcpip\Parameters, to 8192, using the Decimal Radix.

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