I am using a cable broadband but the network just sucks and I get so much of Hang-Ups and the service isn’t good either. I have discovered that if you use DSL or cable broadband, you have a dynamic IP (Internet Protocol) address. So each time you log on your Internet address changes. Your IP address should be assigned by DHCP (Dynamic Host Control Protocol). I read somewhere that this process doesn’t behave as dynamically as its name implies. Sometimes it doesn’t assign a new address at boot-up, and you’re stuck with the previous address. Since a fresh IP address is necessary to reach the Internet, when you open your browser, all you see is an error screen stating that the PC cannot establish a connection to the Internet.

Well I have found out the manual troubleshooting this situation. Below are the steps you will have to perform:

Click Start Menu -> Run -> and type “cmd”.
(In Vista you can save a step simply by typing cmd in the Start Search box.)

At the command prompt, type “ipconfig”.
You will be able to see your current known IP address, the subnet mask, and the default gateway for each adapter bound to TCP/IP with this command. Other adapters might include Wi-Fi and Bluetooth cards, although they may be listed as disconnected.

Refreshing the IP.

As we all know, IPConfig will only show the IP address, the subnet mask, and the default gateway for each adapter bound to TCP/IP, but if used with different parameters we can actually refresh the IP. The two such parameters are ‘/release’ and ‘/renew’ which repairs your Internet connection by renewing or refreshing it.

At command prompt just type “ipconfig /release”. This command instructs the DHCP server to erase the existing IP address for all adapters, either ethernet or wireless. The process should take a few seconds, confirmed with a display in the DOS box showing all zeros for the IP address and subnet mask.

Then type “ipconfig /renew”. If the command is successful, a new IP address, a subnet mask, and the default gateway will appear along with the DNS suffix (basically your ISP’s address, such as comcast.net).

Basically, the two commands are used to as:
/release: Release the IP address for the specified adapter.
/renew : Renew the IP address for the specified adapter.

Variation:
ipconfig /renew: Renew all adapters
ipconfig /renew EL*: Renew any connection that has its name starting with EL
ipconfig /release *Con*: Release all matching connections, eg. “Local Area Connection 1″ or “Local Area Connection 2″

For more info regarding ipconfig and its parameters type “ipconfig /?” (help for the command ipconfig in DOS mode)

ipconfig.JPG

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