A Lotus Notes client on a Windows NT or Windows 95 computer using NetBIOS and
NWLink on Token Ring may fail to connect to a Lotus Notes server on Ethernet.
This symptom can also occur when a Notes client is on a FDDI ring. The network
adapter on one side of the conversation is on a link that has a larger frame
size than the link on the other side, and IPX does not do fragmentation.
According to the IPX specification, it is up to a higher level to determine the
maximum transmit unit (MTU). For NetBIOS traffic over IPX there is no MTU
negotiation scheme. To work around this problem, decrease the frame size of the
Token Ring network adapter to 1,012 bytes on the Windows NT computer.
Value: 1012 decimal radix