Microsoft KB Archive/133490

= Resolving Duplicate IP Address Conflicts on a DHCP Network =

Article ID: 133490

Article Last Modified on 12/5/2003

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APPLIES TO


 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Server 3.5
 * Microsoft Windows NT Server 3.51
 * Microsoft TCP/IP for Windows for Workgroups 3.11
 * Microsoft TCP/IP for Windows for Workgroups 3.11a
 * Microsoft TCP/IP for Windows for Workgroups 3.11b
 * Microsoft Windows for Workgroups 3.2
 * Microsoft Network Client 3.1

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This article was previously published under Q133490



If a static IP address is defined for a network device, for example, a printer, and you install a DHCP server, duplicate IP address conflicts may occur between the network device and a DHCP client computer (running Windows for Workgroups or Windows NT). The conflict also occurs if you manually define static IP addresses to network devices and computers during a network link failure to a DHCP server and then the link is reestablished.

To resolve this conflict:


 * Convert the network device with the static IP address to a DHCP client. -or-


 * On the DHCP server, exclude the static IP address from the DHCP scope.

To exclude the static IP address from the DHCP scope:


 * 1) Turn off the DHCP client computer in conflict with the network device that has the static IP address.
 * 2) On the DHCP server, exclude the static IP address from the scope of the DHCP IP address range.
 * 3) Restart the DHCP client computer.

NOTE: If the conflict persists for a Windows for Workgroups 3.11 client computer, delete the DHCP.BIN file in the Windows directory before you start Windows for Workgroups.

Additional query words: 3.11 wfw wfwg wgao prodnt

Keywords: KB133490

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