Release and Renew Your Internet Protocol Address

Print
When you connect your computer directly to your cable modem, you're given your own unique "Internet address," known as an IP (Internet Protocol) address. You need this address to get on the Internet. Your IP address is assigned by a Dynamic Host Configuration Protocol (DHCP) server. The DHCP server "leases" this Internet to you much like a physical property is leased.

Your IP address doesn't change often, but occasionally, due to "housekeeping" upstream, there will be times when you'll be assigned a short-term DHCP lease and will need to release and renew your IP address before you can reconnect to the Internet.

Why Was I Assigned a Short-term DHCP?

You may have been assigned a short-term DHCP lease for a number of reasons:
  • You connected a new device, such as a computer, or a computer with a new network interface card, to the cable modem for the first time.
  • You turned on your computer for the first time in a very long time, and the DHCP server interprets it as a new connection.
  • The device connected to the cable modem isn't configured to DHCP. You'll need to obtain DHCP configuration instructions for your router from its manufacturer. Learn more about configuring connection settings for XFINITY Internet in Windows.
  • We are performing maintenance on the DHCP servers or elsewhere on our network.
  • The device connected to the cable modem is not functioning properly.

A properly configured device - regardless of the length of its lease - automatically renews its DHCP lease when the current one expires. This shouldn't cause an interruption in service. Occasionally, you’ll have to manually release and renew your IP address. (This may happen when there’s been a power outage, you've moved your computer, bought a new router or reconfigured your home network.) Find your operating system below and follow the steps as directed.

Windows 7, Windows 8 and Windows 10

Windows 7

  1. Click Start and type CMD in the search box. Then click OK.
    • For Windows 10, enter CMD in the Search Windows field on the taskbar, or right click the Start button and click Search.
      Run window opens and cmd is typed in the Open field.
       
  2. Type ipconfig /release and then press the Enter key on your keyboard.
    In Console Command Window, type ipconfig /release.
     
  3. Type ipconfig /renew and then press Enter.
    In Console Command Window, type ipconfig /renew.
     

Windows 8

  1. Swipe up to show the Apps screen. You can accomplish the same thing with a mouse by clicking on the down arrow icon at the bottom of the screen.
  2. Swipe or scroll to the right and locate the Windows System section heading. Under Windows System, tap or click on Command Prompt.
  3. Type ipconfig /release and then press the Enter key on your keyboard.
    Windows 8 Command Prompt window
     
  4. Type ipconfig /renew and then press Enter.
    Windows 8 Command Prompt screen
     

Windows 10

  1. Press Windows and R key together to open the Run dialogue box.
  2. Type CMD and enter.
  3. Type ipconfig /release in the Command Prompt window and then press the Enter key on your keyboard.
    Windows 10 Command Prompt screen
     
  4. Type ipconfig /renew and then press Enter.
    Windows 10 Command Prompt screen

Mac OS X Yosemite, Mac OS X Mavericks and Mac OS X Mountain Lion

  1. Close any open Internet applications (web browsers, email, etc.).
  2. Choose System Preferences from the Apple menu.
    Apple menu
     
  3. Click Network.
    System Preferences screen
     
  4. Select Wi-Fi or Ethernet (depending which one you are using) in the network connection services list.
  5. Click Advanced.
    Network screen
     
  6. Click TCP/IP and then click Renew DHCP Lease.
    Wi-Fi screen

     
  7. Open a web browser and attempt to connect to the Internet.
Print

Find this article at:

https://www.xfinity.com/support/internet/releasing-and-renewing-ip-address/

Was This Article Helpful?

Rate this article on a scale of 1 - 5

Related Articles

Need more help? We're on it.

Find an XFINITY Store or service center near you.