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NEXTSTEP for Intel Processors Release 3.3

Networking Driver Overview

Driver: IBM Token Ring
Driver Overview: NeXTanswer #1788
Last Update:
April 23, 1997

Availability Information

A version of this driver is on the CDROM
Newer Released Driver in NeXTanswers*:
Yes, Version 3.33, as NeXTanswer #2075
Newer Beta Driver in NeXTanswers*: Yes, Version 3.39, as NeXTanswer #2029

Driver Name / Installer .pkg: IBMTokenRing
Driver Type: Networking
Driver Scope: Product Family
Supported Components:
PC Bus / Interface Supported by Driver**: ISA

General Overview notes: This is the new version of the IBM Token Ring driver which adds support for the AutoSense adapters.

Supported Products / Add-on Adapters:
IBM 25F7367 (ISA, 16/4 Mbps, 8-bit, 64K)
IBM 25F9858 (ISA, 4Mbps, 8-bit, 16K)
IBM 67X0438 (ISA, 4Mbps, 8-bit, 16K)
IBM 60G3994A? (ISA, 16/4 Mbps, 16-bit, 64K)
IBM 92G7668 (Auto, ISA, 16/4 Mbps, 16-bit, 64K)
IBM 41H8450 (Auto, ISA, 16/4 Mbps, 16-bit, 64K)

Supported Products / Systems (ie integrated into PC System):
Token Ring option for Compaq DeskPro and Prolinea series

Special Features of Driver / Driver Notes:
3COM TokenLink III 3C619B (Auto, ISA, 16/4 Mbps, 64k) (untested) is reported to work using the "IBM Auto 16/4 Token Ring ISA Adapter" personality.

Networking Driver Details

Network Type**:
Token Ring
Speed*: 16 Mb/s, 4 Mb/s
Access Mode**: Memory Mapped
Buffer Size*: 64KB
Supported Connectors**: STP, UTP

Known Problems

Cannot netboot unless netinfo server is on the same ring. See also NeXTAnswer #2076_Network_Booting_for_Token_Ring_Across_Source_Routing_Bridges.rtf

Driver Version Notes

3.33 Support Auto 16/4 and add Fast Path Transmit
3.34 Survive being disconnected from the MAU, both at boot time and during operation. Fix problem with being the first node on the network.
3.36 Fix problems on a busy token ring. Symptoms include netboot flakiness/receive congestion errors. Performance improvements were also made.
3.37 Fix problem with using an MTU too large for 4Mbit rings. The driver now limits the MTU to 4472 when it automatically switches to 4Mbit/s. The MTU is also limited by the ring speed selection made on the driver's Configure panel.
3.39 Added Plug and Play driver personality to simplify adapter configuration. The adapter is now auto-detected under Configure.

Future Planning

Future / Update Planning:

Reason for New Driver / Update:
New Driver / Update Timeframe:

New Driver / Update Description:
Beta version 3.39 includes a Plug and Play driver personality that requires the latest EISABus driver to be first installed.

Note: Information contained in the "Future Planning" section of this document does not constitute a commitment on the part of NeXT to complete the planned development work.

* - Any NeXTanswer number that is blank indicates that a driver will not be released for this version of NEXTSTEP.

** - Indicates information that is inclusive of the entire capability of this driver. Not all devices supported by this driver may include all features listed. Check any available NeXTanswers and the hardware manual for the device for additional information.

Product Vendor

IBM Corporation
P.O. Box 12195
Research Triangle Park, NC 27709-9990

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