Article ID: 310524 - View products that this article applies to.
This article was previously published under Q310524
When you attempt to view a Web page in Internet Explorer using a cable modem, you may be unable to do so or you may receive the following error message:
Invalid DHCP lease
This behavior can occur if your cable modem is configured to automatically obtain an IP address from a Dynamic Host Configuration Protocol (DHCP) server. Windows XP automatically assigns an IP address if your adapter is unable to obtain one. Because a connection across a cable modem is slower than a connection across a network, using Autoconfiguration, Windows may automatically assign an IP address before the cable modem is able to obtain one from the DHCP server. Since this automatically assigned IP address is not valid for the Internet service provider (ISP), you can not access resources on the Internet using the cable modem.
To work around this issue, use the appropriate method:
One-Way Cable Modems
Two-Way Cable Modems
There are two types of cable modem services, one-way cable modems and two- way cable modems. One-way cable modems send information over the phone line, and receive information over the cable. Two-way cable modems send and receive information over the cable.
When Windows does not initially detect a DHCP service, it assigns an IP Autoconfiguration Address (APIPA). If Windows later detects a DHCP service on the network, Windows switches from the IP Autoconfiguration Address to the address that is assigned by the DHCP server.
To disable Autoconfiguration either on the entire computer or on a per-interface basis, you need to modify the registry. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:
244268For additional informationabout troubleshooting cable modems and IP configuration, click the article numbers below to view the articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/244268/EN-US/ )Routing Does Not Work When Multiple Adapters Use Automatic Private IP Addressing Simultaneously
(http://support.microsoft.com/kb/310089/EN-US/ )Troubleshooting Cable Modems
(http://support.microsoft.com/kb/255836/EN-US/ )Change in DHCP Client Behavior in Windows 2000
(http://support.microsoft.com/kb/120642/EN-US/ )TCP/IP & NBT Configuration Parameters for Windows NT, Windows 2000, and Windows XP
(http://support.microsoft.com/kb/167014/EN-US/ )DHCP Client May Fail to Obtain a DHCP-Assigned IP Address
(http://support.microsoft.com/kb/169289/EN-US/ )DHCP (Dynamic Host Configuration Protocol) Basics
(http://support.microsoft.com/kb/117662/EN-US/ )IPCONFIG Diagnostic Utility: Parameters and Usage
(http://support.microsoft.com/kb/163391/ )Troubleshooting problems communicating with a server on the Internet using a dial-up networking connection in Windows 2000, Windows NT 4.0, or Windows NT
Contact us for more help
Connect with Answer Desk for expert help.