Something happened to the network for about 4 minutes time, we are working to find what this was, it was not planned, and not our equipment it happened outside out network. We will update when we know more.
We have just been informed that the border router threw a software error and rebooted itself. The network is back up fully now, and it will be fully investigated.
We have narrowed the issue down to it only happening when the client is on a cogent based network and returning packets to them is looping, we are working to resolve this with them as soon as possible.
OK We again went down for about 3.5 minutes after they were working on the issue mentioned above. They restarted the router and are going to load a previous configuration at the last update from them.