Here are a set of instructions for checking and troubleshooting the configuration of your IP address.
Checking your IP address is one of the easier pieces of networking information to obtain.
It can be done in a few simple steps, and they are basically the same in almost all versions of Windows
First Click on the START button at the bottom left of your screen,
Then click Run and type in the word Command or just the letters CMD
That will bring up a little black window called a DOS prompt window.
There are several different TCP/IP commands you can use from this window to gain info on your network/computers ability to communicate with other computers
From the DOS prompt type in the command: ipconfig /all
This is going to tell you several important things such as your current IP address, subnet mask, and default gateway.
If you have more than one network card/connection on your computer (i.e. one wireless, one ethernet ) this list may show multiple connections separated by like paragraphs about each one as shown in the graphic above.
Use the name of the connection to determine which one is the one you are currently using to connect to your router or internet connection.
This information is not always 100% accurate, sometimes your computer will show a valid IP address –
Yet not communicate properly with your router
In this case, you want to use a couple of commands that will tell your computer to re-establish communication with the router, by doing what’s called a “release and renew”
The First step is to release the IP address:
Type the command IPCONFIG /RELEASE
This should reset the address to 0.0.0.0
The Next step is to “ask” the router re-assign an IP address to this adapter:
Type the command IPCONFIG /RENEW
The new address should come up as one of your private network addresses such as 192.168.x.x or 172.16.x.x if you are using a router or if you are connected directly to your highspeed modem then you may get an address directly from your ISP.
If you get an address that starts with a 169.254.x.x *there is still a problem with your computers ability to “pull” an accurate address from your router*