Knowledge Base

PRB: Receive Packet Over IPX on a Token Ring Network

Article ID: 194634

Article Last Modified on 7/27/2004

Microsoft Win32 Device Driver Kit for Windows NT 4.0

This article was previously published under Q194634

SYMPTOMS

Windows NT 4.0 NDIS drivers that support NDIS Receive Packet might notice Data Corruption over IPX on a Token Ring Network.

CAUSE

A code defect in NwNbLink caused IPX to only look at the first of multiple buffers.

RESOLUTION

To temporarily work around this problem, use receive lookahead instead of receive packet in your driver code. Also, set the Packet size and buffer size on the Token ring adapter to 2048 or lower to resolve the issue from an end-user perspective.

MORE INFORMATION

IPX allows packets to span multiple receive buffers. Token Ring's larger packet size allows packets to span multiple receive buffers. Ethernet packets are smaller and are not effected by this problem. Windows 4.0 NDIS drivers that support the receive packet algorithm will encounter this problem over IPX with Token Ring.

Keywords: kbndis kbprb KB194634