‘Two major Internet backbone companies are feuding, potentially cutting off significant swaths of the Internet for some of each other's customers.
On Wednesday, network company Level 3 Communications cut off its direct "peering" connections to another big network company called Cogent Communications. That technical action means that some customers on each company's network now will find it impossible, or slower, to get to Web sites on the other company's network.’
http://news.zdnet.com/2100-1009_22-5889592.html
I know this was/is affecting RoadRunner customers, and I’m pretty certain it’s responsible for some lousy bandwidth issues I’ve been having accessing certain sites lately… why can’t we all just get along?
More links (courtesty SANS-ISC):
http://status.cogentco.com/
http://www.hardwaregeeks.com/comments.php?shownews=3713
http://news.google.com/news?q=cogent+level&scoring=d