I am not sure if this is an issue with Shaw, or my xbox however I am pretty certain it is with my Shaw internet. 

A few days ago my roommates and myself changed the name of our wifi and since then myself and my other roommate have been unable to "Get Teredo IP" on our XBOX and are unable to play on XBOX live. We can watch Netflix on our Xbox's and access the internet, however we are both unable to play games on xbox live (i.e. access COD servers). Since this problem is happening to both of our consoles I believe it is a problem with our wifi, if anyone has experienced this before please let me know. It is rather frustrating.