Migrating from APIPA or Alternate Configurations

If a client has already been configured to obtain an IP address and DNS server address automatically, and the network is not using ICS, you merely need to renew the IP configuration to apply the settings from the newly configured DHCP server.

To renew a configuration, enter the ipconfig /renew command at the command prompt. Alternatively, you can restart the client computer, and the new IP configuration is applied as the computer reboots.

Migrating from an ICS Connection

ICS is a shared dial-up connection on a server that provides Internet access to network clients and automatically configures client computers with an address in the 192.168.0.x subnet range. Because this service competes with the DHCP Server service, you should delete any shared (ICS-enabled) dial-up connections on the server and restart the server computer before installing the DHCP Windows component or adding the DHCP Server role.

After the DHCP server is installed and configured, you can apply the new automatic configuration to the client as you would to any statically configured client-by selecting the Obtain An IP Address Automatically option and (optionally) the Obtain DNS Server Address Automatically option in the Internet Protocol (TCP/IP) Properties dialog box.