Good to see cogent and tiscali on the way up. Fortunately cogent has stopped doing the peer a peer b setup.
"Cogent will set up two BGP peers per each customer connection. Peer A is
where the customer will send Cogent its routes and Peer B is where all the routes
are sent to the customer. Two single IP addresses will be assigned for Loopback
addresses on the customer router and the Cogent router. The routes for these
will be announced to each other in Peer A and will be the neighbor IP addresses
for Peer B."