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cannot obtain IP

926 Views 2 Replies 3 Participants Last post by  Wand3r3r
I have a desktop (xp) that is connected to DSL, directly to the modem. It cannot obtain an IP from the telco. The NIC is set to obtain IP and DNS automatically. Installing a new NIC makes no difference. It reports it is connected, but with an IP of

If I connect another computer to the same modem, it will obtain an IP correctly. I set that IP and DNS info manually into the original computer and it is now connected fine. This is only a temporary fix as sooner or later the ISP will change the IP to that account.

I ran a winsockfix also. What could cause this system to not obtain an IP but once past that problem, connects fine?

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Hi unc417. Have you tried replacing the cord that goes from your modem to the PC? If you have try this.

Go to Start > Run and type CMD - click OK

In the command prompt window that opens, type the following commands, each followed by the Enter key:

Reset TCP/IP stack to installation defaults, type: netsh int ip reset reset.log

Reboot your PC.
The ISP is serializing the connection based on the mac address of the laptop. This is why one works and the other does not.

Solution is to put in a router and clone the working laptops mac address to the wan interface basically fooling the serialization into thinking its only that working laptop that is connected
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