Need some Xbox Live help please!!! (Connection Issues)

my computer is fast as hell and i never get disconnected. Just having this problem with xbox i dont think anything is wrong with xbox or the cord

Any time you plug in a different device to your modem you have to restart your modem, so you can try that. I know from experience that Arris modems are fucking bullshit and they crap out easily. What I recommend you do is just wire your xbox to your router because as long as your not wireless you should notice close to no speed difference while wired. I'm almost always game host for any COD game I play.

I always restart the modem when i swap the cord between xbox and computer... should i return the xbox? should i get a router?

Go to 192.168.100.1 and tell me what your signal to noise ratio is and give me a summary of what your event log for DOCSIS events is saying. If there are any problems while your xbox is wired up it should have logged them, you could also wire your xbox up and keep track of the time then wire the modem back up to your computer and tell me if anything got logged while your xbox was wired.

Test the connection?

Get a Hard drive for the xbox
get a router
test connection
Put all the network settings on automatic

been doing alot of stuff nothing seems to work im think im gonna swap the xbox for a new one

This happened to me and i wasn't forced too switch my I.P, My method was Unplug my modem for about a day (Because I went to the pool, and was out for 4-14 hours)

Came home , Plugged it back in my I.P changed, Unplug the wireless connecter, plug it back in, wait 10 Mins, Test Xbox connection, And make sure your profile doesn't auto-sign in, thats what my problem was. Then it should be fixed. :/