KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q139960: Limiting LAN Traffic to One Network Adapter

Article: Q139960
Product(s): Microsoft SNA Server
Version(s): WINDOWS:2.0,2.1,2.11,3.0
Operating System(s): 
Keyword(s): kbnetwork
Last Modified: 13-JUN-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft SNA Server, versions 2.0, 2.1, 2.11, 3.0, on platform(s):
   - the operating system: Microsoft Windows NT 
-------------------------------------------------------------------------------

SUMMARY
=======

Often, systems running SNA Server have more than one network adapter. A network
administrator may want to limit traffic on the LAN adapter. For example, non-DLC
traffic on an adapter that is configured for the 802.2 link service.

This can be accomplished by disabling selected bindings on the network adapter
that provides the upstream connection to the host system.

MORE INFORMATION
================

The example below assumes two network adapters, one ethernet and one Token Ring.
The ethernet adapter is configured for NetBIOS over TCP/IP and the Token Ring
adapter is configured for DLC, NetBEUI, IPX/SPX and NetBIOS over TCP/IP.

The objective is to limit LAN traffic on the upstream DLC connection to the host
by disabling selected bindings on the Token Ring adapter. The steps necessary to
perform this operation are outlined below:

1. Show Bindings for All Components in the Network Bindings Dialog Box.

2. Disable the following bindings:

     NetBIOS Interface --> WINS Client (TCP/IP) -->
     IBM Token Ring Adapter Driver --> (2) IBM Token Ring 4/16 Adapter

     NetBIOS Interface --> NetBEUI Protocol  -->
     IBM Token Ring Adapter Driver --> (2) IBM Token Ring 4/16 Adapter

     Server --> WINS Client (TCP/IP) --> IBM Token Ring Adapter Driver -->
     (2) IBM Token 4/16 Adapter

     Server -->  NetBEUI Protocol --> IBM Token Ring Adapter Driver -->
     (2) IBM Token Ring 4/16 Adapter

     Workstation --> WINS Client (TCP/IP) -->
     IBM Token Ring Adapter Driver --> (2) IBM TokenRing 4/16 Adapter

     Workstation --> NetBEUI Protocol -->
     IBM Token Ring Adapter Driver --> (2) IBM Token Ring 4/16 Adapter

     NWLink IPX/SPX Compatible Transport -->
     IBM Token Ring Adapter Driver --> (2) IBM TokenRing 4/16 Adapter

3. Accept changes and restart the server.

NOTE: It is not necessary to disable SNA Server Link service or DLC transport
bindings because the SNA Server DLC 802.2 link service only communicates over
the adapter specified during SNA Server Setup. There is no traffic generated by
the SNA Server link service over the unused DLC card binding.

Additional query words: prodsna

======================================================================
Keywords          : kbnetwork 
Technology        : kbAudDeveloper kbSNAServSearch
Version           : WINDOWS:2.0,2.1,2.11,3.0
Issue type        : kbinfo

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.