Been having a lot of spiking issues in the past week but it's only for the wireless connections.
I, myself have the router and modem in my room and have an ethernet cable connected to my xbox and my computer.
My xbox connects fine and no spiking at all, open NAT, etc. My computer will not connect via ethernet cable. I've tried multiple cables, from the router, from the modem. I've tried the xbox cable, none seem to work. So I'm forced to connect wirelessly and the wireless is constantly spiking. It makes it very difficult for me to do anything because I haven't been able to go 5 minutes without jumping up to 3000+ ping in a DotA 2 game, constantly disconnected from steam, can hardly watch videos on youtube, 90% of the time pages don't even load.
Not sure if anyone has any ideas of what I could do other than call Shaw ofc. I tried looking on google to no avail.