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As the title says, I have been suffering from severe lag and latency spikes almost constantly when playing online games with Blizzard servers. The time of day doesn't seem to affect it and doing generic router restarts doesn't make a difference. This has been going on for several weeks now and it is becoming unbearable.
Any advice on how to fix would be appreciated.
Where are you located?
I'm in southern california.
Run some trace routes using PingPlotter which you can google to download for free. Its likely over saturated network use in your area which can only be fixed by them upgrading your node or putting in a split node.
ok i'm downloading it right now. If its really just heavy traffic then there's nothing I can do?
Well it means they over sold service and bandwidth in your neighborhood. Cox operates a lot like the Airline industry does now. They oversell what their pipeline can handle with the assumption that not everyone is going to be using the service at the same time. Like airlines over selling seats assuming not everyone is going to show up for every flight. Technically they should not sell you a product their hardware and pipeline cant handle just because everyone is using at it a single moment in time. They can upgrade the node or split the node to fix it.