There are several ways to set up multiple IP addresses on a computer
1. To have multiple network interface cards (NICs) on your computer and to assign a different IP address to each card.
2. To assign multiple IP addresses to a single NIC.
3. To combine 2 previous options: have multiple NICs with multiple IPs assigned to one or more of them.
By default, each network interface card (NIC) has its own unique IP address. However, you can assign multiple IP addresses to a single NIC.
How to assign multiple IP addresses to the same NIC
If you want to assign more than one IP address to a network card on Windows 2000/XP/Vista/2003, follow the steps below.
In Windows 2000
Right-click on My Network Places, choose Properties.
Right-click on the Local Area Connection, choose Properties.
In Windows XP
Right-click on My Network Places, choose Properties.
Right-click on the Local Area Connection, choose Properties.
In Vista
Click Start and click Control Panel.
Select Network and Internet, then Network and Sharing Center, and click Manage network connections from the list of tasks.
Right click your local area connection and click Properties.
In Windows 2003
Right-click on My Network Places, choose Properties.
Right-click on the Local Area Connection, choose Properties.
Highlight Internet Protocol (TCP/IP), click Properties.
If you use DHCP, you should disable it: click Use the following IP address and enter IP address, Subnet mask and Default ateway.Click Advanced… at the bottom.
Enter additional IP addresses: click the Add… button and enter a new IP address and Subnet mask.Repeat the procedure if there are additional IP Addresses to be added.
Click Add under “Default Gateways” and add the gateway addresses.I have entered My gateway address
Click OK 3 times to save the changes.
Test your IP Addresses
Open the command prompt (Start>Run>cmd) run the ipconfig command you can see multiple ip addresses on single network card
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How about if I wanted to use DHCP and add second IP to my local area network (dsl +lan). Windows XP allowed to do it with registry editor but as far as I tested it didn’t work at vista. http://news.softpedia.com/news/Both-DHCP-and-Static-IP-addresss-at-the-same-time-47494.shtml
cool. thx.
very usefull.
Is there a limit on how many IP Addresses I can add to a single network interface in Windows XP?
Is there a way to enable windows file sharing (smb) on all ip?
Currently it works only for the first address in the list.
+1 for the smb issue. I already knew the trick, but file sharing works only within the network and computer of the first configured address. Anyone knows how a machine configured this way could access shared folders on different networks (192.168.x.x\share1 and 10.0.x.x\share2, for example)?
is there a config file somewhere that these can be entered in, to save having to enter about 20 of them one at a time thru the GUI ??
Thanks as I was looking exactly for the information provided here.
Thanks alot for this post … i was buying a network adapter for each ip adress
and i had only 5 slots / server 
) stupid me … doh …
@vortecs
)
you are not the only one
how do you remove on address that doesn’t even show? I just loaded server 2008 and the ipconfig shows 2 ip addresses 192.168.1.2 and 192.168.1.10. I put 1.10 in but the 1.2 shows up and nothing shows in the NIC properties. As an extra now the computer said it’s connected to the internet but won’t go anywhere….
My Windows xp shows a different Advanced TCP/IP setting.
How to switch IP for outgoing package ?