If, you couldn't get to some of your servers today, or email was overwhelmingly slow, or more probably: servers worked from one location, and not another, here's why:
Those red outlines indicate that the network availability dropped below 90% at cogent.
I didn't notice until late into the outage (well, I did notice, but I didn't know why the net was sucking so much), this grab was of a 4-hour period, at ~18:00 EDT, and some of those points are reading 82%. That means that over the course of the past 4 hours, the cogent network was only available 82% of the time.
This makes approx. 43 minutes of downtime in the past 4 hours.
So much for five nines. At least it seems to be working now.