DHCP woes

I’m trying to connect my iMac via airport extreme to my SpeedStream6520 ADSL modem/router. It has wireless in that my pc notebook can connect to it via netgear 54mbps USB adapter.

Here’s my new predicament-

So I’ve connected to the SpeedStream network (on my mac), and set it to configure using DHCP. This is so that the router can assign an Ip address/details, correct? The gateway is 10.0.0.138 by default, and DHCP range 10.0.0.1 thru 10.0.0.137. When airport connects, its self-assigned an IP of 144.3.8.0. Its not in the DHCP range (where as other computers and when this mac is connected via ethernet, its assigned 10.0.0.1, 10.0.0.2, etc). It cant reach ISP. Is this why I cant connect to the internet (using airport)? Why is this happening?

When I manually assign an IP address, it still doesnt come up in the device list of my router’s configuration webpage. Airport’s status says its connected to base station ID ‘00:0B:23:EA:1A:04’ , but the last two digits are different to the speedstream’s mac address.

Bah. I’m sick of this. Why is my IP address like this?

I recently bought an airport extreme base station too, and I’ve had soo many problems connecting it too.

Make sure you set the domain and Client name to nothing, and make sure it recieves the IP automatically. that worked for me, then it recieved the correct Domain name also automatically.

I DID have to reset the box several times before it actually caught the IP :-/