How to configure multiple ips on Single NIC

If it is in windows go to advanced in tcp/ip properties of network/NIC.

If it is linux Let me know i will guide you.

Sridhar.

For Windows:

Access the local area connection by clicking Start > Programs > Settings > Control Panel > Network Connections> Local Area Connection
Click Properties button
Double-click Internet Protocol (TCP/IP)
Click Advanced button
Click Add button in the IP addresses section of the IP Settings tab
Enter a proper IP address (for example, 10.1.200.40) and Subnet Mask (for example, 255.255.255.240), then click Add
Click OK to close the Advanced TCP/IP Settings property sheet
Click OK to close the Internet Protocol (TCP/IP) property sheet
Click OK to close the Local Area Connection property sheet

See the following link for Linux machines:
http://linuxhelp.blogspot.com/2005/05/setting-up-multiple-ip-addresses-on.html