Ordinarily, you can set up to five IP addresses per network card
installed, under the settings for TCP/IP (in Control Panel, double-click
the Network icon, then click the Protocols tab; on the Protocols tab,
select TCP/IP Protocols, then click the Properties button; on the IP
Address tab, click Advanced...). However, it is possible to add more than
five IP addresses to a network card by modifying the registry.
Windows NT 4.0 has no limitation on the number of IP addresses that can be
bound to a NIC. The limitation is on system resources.
Use the Registry Editor (REGEDT32.EXE) to add your IP addresses and subnet
masks, as follows:
WARNING: Using Registry Editor incorrectly can cause serious,
system-wide problems that may require you to reinstall Windows NT to
correct them. Microsoft cannot guarantee that problems resulting
from the use of Registry Editor can be solved. Use this tool at your
- Start REGEDT32.EXE and locate the following Registry subkey:
- Find the IPAddress value and double-click it.
- The Multi-String Editor dialog box should appear with the IP address
selected. Type each additional IP address on a new line within the
dialog box, then click OK. For example:
- Find the SubnetMask value and double-click on it.
- The Multi-String Editor dialog box should appear with the Subnet Mask
selected. Enter each additional subnet mask on a new line
within the dialog box, then click OK. For example:
IMPORTANT: The order of the IP addresses and subnet masks must
- Exit REGEDT32.
- Exit Windows NT and restart your computer.
You should have all of the IP addresses specified in the registry bound
to your network cards.
Article ID: 149426 - Last Review: October 31, 2006 - Revision: 1.1
- Microsoft Windows NT Workstation 3.51
- Microsoft Windows NT Workstation 4.0 Developer Edition
- Microsoft Windows NT Server 3.51
- Microsoft Windows NT Server 4.0 Standard Edition