Ip addresses im trying to hook up my xbox live and my ip address keep saying failed i have a wireless adapter and i got my ethernet cable hookied up from my computer to my xbox 360

you need to set your 360's network to automatically detect your settings if you have other devices hooked up to the airport and they work it is not the Airport.

When it says IP address failed it has nothing to do with comcast it is your LAN having issues not your WAN

every computer has an ip adress you might have to go to your internet setting and find some thing that says some thing like... internet adress hook up hopefully you keep files on your computer becuase with out your ip adress you might not be able to hook up its sorta like a combination hope it helpes:)

In order to connect your XBOX 360 to your laptop (if the laptop is connected via dial-up), you'll need a cross-over ethernet cable. It's a special type of ethernet cable, which is typically the same price as a regular ethernet cable, but it allows two devices (in your case) to communicate with each other. Then, you'll need to configure your laptop to allow incoming connections via your Control Panel -> Internet Connections preferences.

Hope this help!
Robert W.

i had to change my ip address and so forth from manual to automatic because all the xbox needed to do was find everything by itself so that it could actually connect to my wireless network.

I think you need to ring your internet provider and they will enable xbox live from their side. Its fairly simple and they will know what your talking about.

it way be that your modem and/or router does not recognize the ethernet cord. the contacts on either the cord or port might be fried. try plugging the xbox cord into the laptop port if the laptop is hooked up by cord or try using a wireless adapter for your xbox if the wireless seems to work fine with your laptop.

i have everything hooked up but when i go to get on xbox360 live it tells me that my ip address failed . i do not know what that means.

ok, firstly i hate these problems.
first things first, switch your hub off (leave for 2 mins) switch back on, this may refresh the ip address, also switch your xbox off.. then try agian.
Get back to me and let me know what happens from here.

oh also are you connecting your xbox to the pc? or directly to your broadband hub? if you can connect it directly to your hub, this should solve any problems

Connect it to your router with an ethernet cable.
Make sure the router is setup correctly to your modem, if you can connect all your devices by ethernet cable to the internet then it's set.
If you are using a wireless connection and if it asks for the WEP or WPA key, make sure that you are entering the correct encryption key. You may want to call your router manufacturer to know the correct key for the wireless connection. FYI, it will say that the wireless network is connected but it will still fail the IP Address.

If you have a wired connection and the IP Address or DNS failed, I suggest you to call your Internet Service Provider to check for the Internet connection and obtain these (static IP address, subnet mask, default gateway, primary DNS server and secondary DNS server). If your Internet is okay, enter the IP settings manually on the console (System > Network Settings > Edit Settings > IP settings).

That should work.

try resetting your router & modem.unplug modem,unplug router....plug up your modem wait 4 all the little lights 2 light up & then plug up your router.if that doesn't work i don't know ;)