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First, reboot your modem and computer (and router if applicable). Test your connection.

Attempt to restore your network connectivity by releasing and renewing your IP address:


  • In Windows 9x: go to Start | Run, and type winipcfg. Click the Release All button, then click Renew All.

  • In Windows 2000: open a Command Prompt (Start | Programs | Accessories). Type ipconfig /release and then ipconfig /renew.

  • In Windows XP: go to Start | Run and type cmd to open a command prompt window. Type ipconfig /release and then ipconfig /renew.

  • In Vista: The only way to release the ip address at the command prompt is with admin access.
    From the Start Menu, enter cmd in the Search box, then press "Enter".
    Click "cmd" in list. Command Prompt displays.
    To view your IP address, at the command prompt, enter ipconfig, and then press "Enter".
    To release your IP address, at the command prompt, enter ipconfig/release, and then press "Enter".
    To renew your IP address, at the command prompt, enter ipconfig/renew, and then press "Enter".
    Click X to close the Command window.
    All steps complete.

    Test your connection.

If that fails, you will have to call comcast (1-800-COMCAST), and they will be able to help you.

*This FAQ is based on user knowledge from a volunteer core of BroadbandReports' members. This FAQ in no way constitutes official information from Comcast or any of its affiliates.

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by File Quit See Profile edited by Johkal See Profile
last modified: 2008-11-01 14:48:45