IP Not Resolving on Windows XP Wireless Connection

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NiteFenix

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Hi There

I hope I'm posting this in the correct forum.

My problem is this:

I have two Netgear routers set up. One as the ADSL Gateway & DHCP server and the other as a pure wireless access point. The one is on one property, the other, connected via fibre optic cable, is on the property next door.

All the other pc's on the network, both cabled or wireless is connecting without a problem. DHCP is assigning IPs without a problem. On the Vista laptops (on wireless), once I enter the WEP key, it connects without a hitch.

Now on the Windows XP laptop, I enter the correct WEP key but the DHCP for some reason does not assign the IP address. It just assigns a temporary 169 IP address and displays limited or no connectivity.

I've tried to disable the DHCP client service, restart and re-enable it. I've made sure that the WEP key is correct. I've flushed the dns, I've flushed the winsock. Nothing seems to want to work.

Now the odd thing is this. Before we removed the IShield it seemed to connect, bar the problem where it displayed that our cap had been reached. After the Ishield was removed, everything else worked, but the XP laptop.

Any advice would be appreciated.

Thanks

NiteFenix
 
Is the wireless actually connecting? If so, you should be able to statically assign settings and get connectivity.

If this doesn't work, try to find where the problem is. Get wireshark and from the xp machine, check if DHCP OFFERs are making it through. If so, the problem is with xp. What service pack are you running? If not, the problem is with the network.
 
I've reset the router to default settings. It seems there was a glitch somewhere.

Everything is up and running now.

Thanks

(Wireshark is a brilliant program though, so thanks for that tidbit of information).
 
This will happen every time you re-login.
The problem is a change in the way Microsoft handles the DHCP resolution.
Changes in the protocol result in the following communication:
MS : give me an ip address, here is my MAC address
DHCP : Here is your IP Address, that MAC address used it before.
MS : Error because you said that I used it before.
MS : Give me an ip address, here is my MAC address.
DHCP : Here is your IP Address, that MAC address used it before.
endless loop.

To solve:
- clear the router's memory of saved DHCP stuff.
- change the mac address of the network card trying to connect, every time.
- upgrade the router's software to leave out the "that MAC address used it before" part of the return message.
- Stop using DHCP on that wireless connection, enter an IP Address manually in the network settings screen. If it problem happens again, enter a new ip address.

I eventually upgraded Telkoms router to the latest billion software to solve the problem, after using the fixed ip address solution for a couple of months.

The problem started happening with the installation of XP SP3.
 
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