Assigning LUs/Pools to Workstation MAC Addresses Not Supported

This article was previously published under Q191610
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SNA Server does not allow workstations to be defined using theworkstation's media access control (MAC) address, except in the case ofInternetwork Packet Exchange (IPX) clients. IPX addresses include the MACaddress of the workstation; therefore they are identified by their MACaddresses. Workstations cannot be defined using their MAC addresses if theycommunicate with the SNA Server using TCP/IP.
SNA Server was not designed to allow the use of MAC addresses forworkstation definitions for TCP/IP connected clients. SNA Server does notknow the MAC address of TCP/IP connected clients, because thisinformation is not returned to the SNA Server computer by the SNA Serverclient software.
Microsoft has confirmed that this is a problem in SNA Server versions 3.0,3.0 SP1, 3.0 SP2, 3.0 SP3, 4.0, and 4.0 SP1.

This problem was corrected in SNA Server version 4.0 U.S.Service Pack.

For information on obtaining this Service Pack, query on thefollowing word in the Microsoft Knowledge Base (without the spaces):
With these updates applied, SNA Server 4.0 SP1 allows you to define workstations using the client's MAC address to connect to SNA Serverwith TCP/IP.

NOTE: Updates must be made to both the SNA Server computer andall Windows 95 and Windows NT clients to support this new feature. TCP/IPclients that do not have the updates applied continue to functioncorrectly, but LUs/Pools cannot be assigned to their MAC addresses.

After you apply the updates, to define workstations using a MACaddress: in SNA Server Manager, in the Workstation Properties dialog box, in the Workstation ID box, type the MAC address. In addition, ensure theWorkstation ID Type parameter is set to Address.

There are three ways you can add a TCP/IP connected workstation to the SNAServer configuration file:

Workstation IDWorkstation ID Type
NetBIOS nameName
TCP/IP addressAddress
MAC addressAddress

When SNABASE searches for the user's workstation definition in theconfiguration file, it does so in the order shown above (that is, aworkstation name has the highest priority, next highest priority is theTCP/IP address, and lowest is the MAC address). The rights do NOTaccumulate. For example, if both a NetBIOS name and a TCP/IP address areconfigured for the same workstation, the TCP/IP address is never used(assuming the workstation has a NetBIOS name).

NOTE: The new feature requires that you install Client for Microsoft Networks on the Windows 95 system that runs the SNA Server client forWindows 95.

Article ID: 191610 - Last Review: 02/23/2014 01:10:31 - Revision: 4.2

Microsoft SNA Server 3.0 Service Pack 4, Microsoft SNA Server 4.0

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