NetBIOS Scope ID All Uppercase in Windows NT 4.0

In Windows NT 4.0, a NetBIOS Scope ID can only be typed in uppercase in the
TCP/IP Protocol Properties dialog box. This entry is therefore stored in the
registry in uppercase. However, the Windows NT 4.0 dynamic host configuration
protocol (DHCP) manager scope option 047 allows the NetBIOS Scope ID to be case
sensitive. If this is not configured with all uppercase characters, clients who
have static TCP/IP properties will not be able to communicate with DHCP clients.
You will need to used a registry editor to change the vaule of subkey
ScopeID to the required case.

You cannot configure NetBIOS scopes on a Windows 2000-based computer by using
the graphical user interface (GUI) or with Dynamic Host Configuration Protocol
(DHCP). You have to create this registry hack. In Q244438 , Microsoft warns:

The use of NetBIOS scopes as described in
this article is included only as a convenience for limited situations in which
they absolutely must be used, and no other alternatives exist (such as VLANs,
IPSec, more restrictive use of NTFS and share security, and so on). The use of
NetBIOS scopes is discouraged, and there are no guarantees that NetBIOS scopes
will be supported in future releases of Microsoft products.

Hive:HKEY_LOCAL_MACHINE
Key:
System\CurrentControlSet\Services\NetBT\parameters\

Name:ScopeID

Type:REG_SZ

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