Exactly. And this is why Cogent's statement to the public (and their customers) is an outright lie. Level 3 isn't "denying Level 3's customers access to Cogent's customers and denying Cogent's customers access to Level 3 customers.". It's just that they deny Cogent settlement-free direct peering anymore. Cogent can get the L3 and L3 customer routes elsewhere if they want. But Cogent doesn't. It's Cogents decision to break connectivity, not L3's.
So if you're a Level(3) customer and you ask their network to exchange packets with an IP address reachable only through Cogent, and they can't do so, how does that differ from the reverse situation? If you pay a network to move bits for you, they should be making the best effort to move those bits. Level(3) is now making less of an effort. So is Cogent. Customers of both networks lose out, and have a right to be irritated. I wonder what the traffic levels and ratios involved are. I'm sure that's a big part of the untold story. Kevin