How to Setup Lan Connection in Windows 8
Hello Tony,
Thank you for providing us the opportunity to assist you.
As you have mentioned that you want to keep sane IP address without using internet connection, that might be possible but you will need router to connect all of your computers. The steps provided below is not a sure shot resolution but you may try this and see if it helps.
There may be times when you need your PC to retain the same local IP address every time it boots up. Forwarding ports, sharing content on your network, and other things can all be made easier when your computer's IP address never changes.
DHCP stands for Dynamic Host Configuration Protocol and is the recommended method for forcing your computer to use and reuse the same local IP address. Every home router utilizes DHCP, and anytime you jump on to a Wi-Fi or wired network, you are more than likely obtaining an IP address through DHCP.
Every router manufacturer is going to have a slightly different way to configure DHCP reservations, but it should go something like this:
First, we need to figure out the IP address of our router, so we can go in and configure it. Bring up a command prompt by pressing Windows key + X and selecting Command prompt (Admin) and type ipconfig.
You'll need to look for the Default Gateway IP address.
If you have trouble with the command line or just prefer to find the information with the GUI, you can navigate to Windows key + X > Control Panel > Network and Internet > Network and Sharing Center > Change adapter settings.
Once you're in that menu, right-click on your network adapter > Status > Details.
In the details menu, you'll see your default gateway listed.
Now that you know your router's IP address, type it into a browser to get to the configuration menu.
Your router should prompt you for a password, like in the screenshot above. If you've previously configured a password for your router, enter it and click OK. If not, then it should still be at the default value. Linksys and a lot of other routers use a blank username and the password "admin" for authentication.
Depending on the type of router you're using, you may have to fish around a bit for the DHCP settings. On Linksys, the DHCP settings are on the first page when you login. Regardless of the type of router you have, your DHCP page will look something similar to this:
As indicated in the screenshot above, click on DHCP Reservation. You'll be brought to a screen like this:
This menu already has the MAC addresses, IP addresses, and hostnames populated. It makes things easier because all you have to do is select the desired system, pick an IP address, and click "Add Clients". When the settings are finished, you'll see them listed under "Clients Already Registered", as seen in the screenshot above.
If your router doesn't automatically populate the MAC addresses for you and makes you put it in yourself, you can get your MAC address the same way we got the default gateway address earlier.
Once you have your settings configured and saved, your system(s) should now start pulling the same local IP address all the time.
Hope this would help. Do get back to us if you have any more concern related to Windows.
Regards,
Ramesh Kumar.
How to Setup Lan Connection in Windows 8
Source: https://answers.microsoft.com/en-us/windows/forum/all/lan-network-in-windows-81/a24c6bf0-3eef-492c-b215-fae1ee741747