> The tools cannot estimate burden into the peers network very well, > particularly when longest-exit routing is implement to balance the > mileage burden, so each party shares their information with each other > and compares data in order to make decisions. > > It's not common, but there are a handful of peers that share this > information with each other.
i have not been able to find it easily, but some years back rexford and others published on a crypto method for peers to negotiate traffic adjustment between multiple peering points with minimal disclosure. it was a cool paper. randy