UPDATE 12:30 PM: This morning, we noticed a denial of service attack, that had decent volume, going towards one of our customers. The impact initially of this attack was not that severe, and we were trying to work with the customer to get the attack under control without impacting our customer via our IDS system. After a short time, the attack grew in intensity, and did start to impact other customers on the same network segment. At approximately 9:30AM Eastern, the attack grew again, however started to include our core routers in the attack, which was not seen previously. The attack directed at our core routers caused BGP to begin to flap with our peers to the Internet, as well as with other core routers. Due to the volume of traffic directed to our routers, especially here in Tampa, we had slow responses when consoled in working on the issue. We were able to get some additional blocks and ACLs in place to stop the attack against our core routers. This took time obviously working with slow console response. At approximately 11:00AM Eastern, we were able to restore all BGP sessions and traffic did return to normal.