BoxRouter2.0 is a new global router for ultimate routability. It is inspired by BoxRouter [1], but can perform multi-layer routing with 2D global routing and layer assignment. The 2D global routing is equipped with several ideas: such as robust negotiation-based A* search for routing stability, and topology-aware wire ripup for flexibility and so on. After 2D global routing, 2D-to-3D mapping is done by the layer assignment which is powered by progressive via/blockage-aware integerlinear programming.