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Q199288: H-Node Multihomed Host May Send Broadcasts Immediately

Article: Q199288
Product(s): Microsoft Windows NT
Version(s): 3.51,4.0
Operating System(s): 
Keyword(s): kbnetwork
Last Modified: 03-APR-2002

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The information in this article applies to:

- Microsoft Windows NT Workstation versions 3.51, 4.0 
- Microsoft Windows NT Server versions 3.51, 4.0 
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SYMPTOMS
========

When you configure a network adapter on a multihomed h-node host to query
Windows Internet Name Service (WINS), another network adapter without this
configuration may appear to follow the h-node type name resolution method
correctly.

NetBT sends a name query to WINS from the network adapter that is configured to
query WINS, but almost immediately sends a name query broadcast from the network
adapter that is not configured to query WINS. The nonconfigured network adapter
does not wait for WINS name resolution to be unsuccessful.

CAUSE
=====

This behavior occurs because a multihomed computer places calls on all adapters
to which NetBT is bound, and each adapter works independently to resolve the
name and to make a connection.

RESOLUTION
==========

To resolve this problem, use an Lmhosts file to preload entries in the NetBIOS
cache table. This cache is checked first before the host queries WINS or sends a
broadcast.

You can also configure the host to use p-node so that it uses only WINS and never
broadcasts.

STATUS
======

This behavior is by design.

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

The NetBT node type determines what method NetBT uses to register and resolve
names. An h-node system queries the name server first, and then broadcasts.

Typically, all adapters in an h-node type host are configured to use WINS.

REFERENCES
==========

For additional information, please see the following articles in the Microsoft
Knowledge Base:

  Q120642 TCP/IP and NBT Configuration Parameters for Windows 2000 or Windows
  NT

  Q119493 NetBIOS over TCP/IP Name Resolution and WINS

  Q105997 Differences Between the HOSTS and LMHOSTS Files in Windows NT

Additional query words:

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Keywords          : kbnetwork 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT351search kbWinNT400search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbWinNTS351 kbWinNTS351search
Version           : :3.51,4.0
Issue type        : kbprb

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