This article was previously published under Q65203
This article has been archived. It is offered "as is" and will no longer be updated.
The information listed below applies to both OS/2 and DOS LAN Managerversions 2.0, 2.1, 2.1a, and 2.2.
The current version of 3Com's OS/2 network operating system is 3+Openversion 1.1, based on Microsoft DOS / OS/2 LAN Manager version 1.01.In order for a session to be established between a 3+Open 1.1 networknode (server or workstation) and a Microsoft DOS / OS/2 LAN Managerversion 2.x network node, both nodes must be configured to use thesame transport protocol.
Microsoft MS-DOS / OS/2 LAN Manager versions 2.x include the NetBEUI2.x transport protocol.
3+Open 1.1 includes the following transport protocols:
* On a DOS workstation, 3Com's XNS can be installed as a full protocol, or can be "demand loaded" via 3Com's Demand Protocol Architecture. The demand loaded version cannot be used as a transport for DOS / OS/2 LAN Manager. It is mainly used to allow primary NBP transport users to access 3Com's XNS based mail and internet services.
The following is a list of options for transport protocol matching toallow interconnection between 3+Open 1.1 and DOS / OS/2 LAN Managerversion 2.x nodes:
Using NetBEUI on the MS-DOS / OS/2 LAN Manager nodes and MNETB on the 3+Open nodes
Undesirable for 3+Open DOS workstation users in that MNETB, along with the required DLC layer, takes up a considerably large amount of RAM (67K more than NBP) and is quite slow.
Necessitates support of two different NetBEUI transport implementations.
NBP on all nodes
NBP is NOT compatible with NetBEUI. NetBEUI is a standard transport in Microsoft DOS / OS/2 LAN Manager version 2.x, and in most OEM (original equipment manufacturer) DOS / OS/2 LAN Manager implementations (ATT, NCR, IBM, etc.). It is easier for Microsoft and its OEMs to support NetBEUI.
You may need to obtain permission from 3Com to use NBP as a primary transport on DOS / OS/2 LAN Manager version 2.x.
The DOS NBP that is included with 3+Open 1.1 will work with DOS LAN Manager version 2.x. However, the OS/2 NBP included with 3+Open 1.1 WILL NOT work with OS/2 LAN Manager version 2.x. You are required to use the OS/2 version 1.21 compatible version of NBP.
DOS NBP uses 13K to 14K less RAM than NetBEUI.
Using NetBEUI on all nodes
Sanctioned and supported by Microsoft.
Maintains transport compatibility with most current and future OEM implementations.
Microsoft LAN Manager development reports that internal testing shows that NetBEUI 2.x is slightly faster than NBP.
Works properly with 3+Open 1.1 demand loaded XNS.
Using mixed NBP and NetBEUI
Install NBP (OS/2 version 1.21 compatible version), in addition to NetBEUI, on all OS/2 LAN Manager version 2.x servers leaving NBP on 3+Open 1.1 workstations and NetBEUI on OS/2 LAN Manager version 2.x workstations.
Install NetBEUI, in addition to NBP, on all 3+Open 1.1 servers, leaving NBP on 3+Open 1.1 workstations and NetBEUI on OS/2 LAN Manager version 2.x workstations.
All workstations could communicate with all servers, but OS/2 LAN Manager version 2.x workstations could not communicate with 3+Open 1.1 workstations.
Listed below are the procedures for installing NetBEUI on 3+Open 1.1nodes that have been previously configured with NBP, or NBP with XNS.
On a 3+Open DOS Enhanced Workstation, do the following:
Remove the NBP line from the AUTOEXEC.BAT file.
In the CONFIG.SYS file, add the following line after the MAC driver device line:
* BINDINGS should be the same as BINDINGS in the [NBP] section.
Shut down and reboot the workstation/server.
A 3+Open 1.1 server can be fully administered from an MS-DOS / OS/2LAN Manager version 2.x workstation via the command line or the NIF.Supported administrative functions are the same as in MS-DOS / OS/2LAN Manager version 1.01.