This document proposes a routing coordination framework called PEMP (Peering Equilibrium MultiPath) that allows carriers to better coordinate their peering links through multi-path routing while preserving independence. PEMP uses the MED (Multi-Exit Discriminator) attribute in BGP to signal routing and congestion costs between carriers. Carriers can then select Pareto-efficient Nash equilibria to determine optimal load balancing strategies. Simulations show that PEMP can decrease routing costs by 10% compared to BGP Multipath, and significantly improve route stability while avoiding congestion on peering links.