DOCUMENT:Q102795  26-AUG-1993  [W_NT]
TITLE   :NT Err Msg: A Duplicate Name Exists on the Network...
PRODUCT :Windows NT
PROD/VER:3.10
OPER/SYS:WINDOWS
KEYWORDS:

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The information in this article applies to:

 - Microsoft Windows NT operating system version 3.1
 - Microsoft Windows NT Advanced Server version 3.1
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SYMPTOMS
========
With Windows NT, multiple network adapters in one machine must be on
different networks (either physically separate networks or different
logical networks with different transport protocols). Otherwise, you
will receive the following error message:

   A duplicate name exists on the network. This error prevented the
   network from starting.

CAUSE
=====

The duplicate name exists on the network error occurs because each
adapter will attempt to register itself on the network using a NetBIOS
name. When the adapters try to register their NetBIOS names on the
network, only the first adapter that attempts to register its NetBIOS
name will succeed. The second adapter's attempt to register its name
will generate the error message above and fail to register.

Windows NT does not check for these potential conflicts when a second
network adapter is installed. Windows NT simply binds all installed
protocols to the second adapter, regardless of whether they were bound
to the first network adapter.

RESOLUTION
==========

To work around this error, either manually disable the bindings or
remove the conflicting protocol from the second network adapter. This
can be done using the Network option in Control Panel

Additional reference words: 3.10 W_NTAS

KBCategory:
KBSubcategory: netsrv prot

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