Call of Duty Black Ops 3 Xbox One Issue

Hello,

 I just purchased a C3700-100NAs or N600 Cable Modem Router. I also just switched service to Comcast and never used this router until my service started with them. I am having an odd problem and have tried almost everything I can think of. My issue is when I am wired, I cannot log into Call of Duty Black Ops 3 online. When I am wireless I am able to but cannot get my NAT Type to anything above moderate and I am getting lag. My wirless speed down is about 55 mbps and 12 mbps up in wirless mode and in wired mode it is 150 mbps down and 12 up. I have already tried forwarding the neccessary ports for the Xbox One and Call of Duty Balck Ops 3 and it did not change anything. I have also tried disabling the UPnP, giving the console a static IP, adding the console to the DMZ. I just do not understand how this is even possible. I would think that having it wired would work no problem. Any ideas????? I dont know what to do. Microsoft and Comcast both say everything is fine on their end. I have not had a chance to talk to Netgear yet though cause I am at work right now. Just reaching out in case someone had the same problem and fixed it.

Thanks