When you copy files to a Novell NetWare file server using Windows for
Workgroups with NetWare Connectivity and the IBM Token Ring 4/16 network
adapter, the system may stop responding (hang) and/or files may become
Symptoms may include system hangs when copying files to a NetWare server
from the Windows for Workgroups File Manager or from an MS-DOS command
prompt (either inside or outside Windows).
To work around these problems:
Windows for Workgroups 3.1
Use the Advanced Card Settings option in Control Panel to increase the
number of transmit buffers and the transmit and receive buffer sizes.
Windows for Workgroups 3.11
Use the Network Setup icon in the Network group to increase the number of
transmit buffers and the transmit and receive buffer sizes.
The default values for the number of transmit buffers and the transmit and
receive buffer sizes may not be large enough for some IBM Token Ring
configurations, particularly those running at 16 Mbps.
The Token Ring specifications define a maximum length of time any adapter
can hold the token. This, along with the hardware capabilities of the Token
Ring adapter, determine the buffer sizes you should use. The following are
valid ranges for RECVBUFSIZE and XMITBUFSIZE:
4 Mbs Adapter 256-2040
4/16 Adapter Running at 4Mb 256-4096
4/16 Adapter Running at 16Mb 256-17952
Use the Advanced Card Settings option in Control Panel to change the
settings as follows:
XMITBUFS=2 (default is 1, maximum is 2)
XMITBUFSIZE=1024 (default is 256, recommended is 2040)
RECVBUFSIZE=1024 (default is 256, recommended is 2040)
For additional information about the meaning and use of these buffer sizes,
query on the following words here in the Microsoft Knowledge Base:
tuning and lm and token-ring
"LAN Manager Installation and Configuration Guide" for version 2.2,