Static IP Connections

If the network you’re trying to connect to uses a static IP, you will need to manually configure your laptop. You must enter the IP, Subnet mask, and Gateway/ Router IP information. If any of this information is wrong, you will probably not be able to connect. The best way to avoid problems with incorrect information is to avoid changing your network settings every time you change locations. Chances are you don’t have this information handy; you’ll have to obtain it from your IT department or ask them to configure the settings for you.
WinXP has built-in support for two Ethernet network configurations; however, one of the configurations must use a DHCP server and the other must use static or self-assigned IPs. To configure WinXP for two Ethernet configurations, right-click the My Network Places icon and select Properties from the pop-up menu. Right-click the Local Area Connection icon and select Properties from the pop-up menu. Select the General tab, double-click the Internet Protocol (TCP/IP) option, and then select the Obtain An IP Address Automatically option. Select the Alternate Configuration tab and select the User Configured option. Enter the appropriate IP address, Submask, Default gateway, and DNS and/or Win server addresses, and click OK.
WinXP will now automatically switch between the two configurations as necessary to make a connection. All you need to do is plug in the Ethernet cable and boot your computer. Earlier Windows versions don’t support the alternate configuration option, but there are thirdparty programs available that can add multiple configuration support for your Ethernet connection. Some notable possibilities include NetSwitcher ($19.95 per license; J.W. Hance; www.netswitcher .com), Select-a-Net ($10; Digerati Technologies; www.digeratitech.com /products/selectanet.htm), and IPSwitcher (Basic $20, Pro $30; Softmate; www.ipswitcher.com).