I have WoW! 1000mbps and I have my own modem. Arris sb8200 is the modem and the router is...

Arris modem is just a modem with one port ? Most isp arris modems are also routers is why I ask...

SOLVED !!

I figured it out myself but it was a weird one.

I'm using an Aaris SB8200 cable modem that connects to my router. The SB8200 has 2 Ethernet ports (if you have a second public IP from your ISP and wanted to run link aggregation). I had my router connected to port 1.

I unplugged power to the Aaris and removed the cable from port 1. I waited 30 seconds then plugged power back in. As the Aaris was reconnecting to my ISP I plugged the cable from my router into Port 2 of the SB8200. That was it !! Everything back and working. I'm still not sure why this worked but at this point I'll take it and run 😀

It was the last thing I tried because I had constantly power cycled the modem and router but each time the cable was plugged into the Ethernet port on the SB. Removing the cable and connecting it back during the modem connection cycle made the difference, so I'm guessing some connection specific data was stored on the modem.

Hope this proves useful for someone else.

will changing this mess up anything on my xbox cause i have my xbox mac binded to my router. i have tenda router and a arris modem

ooooooooooo its an arris tg862 i thoght it was just a modem but it is a modem/router

Well, I figured it out... I have an Arris Cable modem which has a built in router. I have an additional router to handle the traffic better. So, I tried bridging my cable modem, but it wouldn't let me. So, I connected my xbox to the cable modem router.
Put the Xbox into the DMZ through there, and BAM.. OPEN NAT for my xbox and Call of Duty!