Fix for Vista does not keep its DHCP IP address if a DHCP server is not available

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If a Windows Vista-based Dynamic Host Configuration Protocol (DHCP) client computer is restarted and if the DHCP Server service is not available, the client will not maintain a valid lease. Therefore, you cannot access some network resources.

The computer loses the IP address that was assigned to it by the DHCP server even though the default gateway is available. Instead, an Automatic Private IP Addressing (APIPA) address, such as 172.16.0.0, is assigned to the client computer. Or, if the adapter was assigned an IP address by using the Alternative Configuration tab for the adapter, the adapter will use this address.

Solution

Click Start, type regedit in the Start Search box, and then press ENTER

Locate and then right-click the following registry subkey

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\<Adapter>

Right-click DontPingGateway, and then click Modify.

In the Value Data box, type 1, and then click OK.

This procedure forces the client to keep its DHCP IP address, even if a DHCP server is not available. If you use the Alternate Configuration tab to modify the IP address for an adapter, this IP address is assigned to the adapter.

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Topics: Windows Vista

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