A DINloop-Based Inter-Domain Multicast Using MPLS

Overview

To overcome scalability and control overhead problems existing in inter-domain multicast, DINloop (Data-In-Network loop) based multicast with MPLS is proposed. DINloop is a special logical path formed using MPLS Label Switched Paths and it consists of multiple DIN Nodes which are core routers that connect to each intra-domain. DINloop is used to manage inter-domain multicast group membership. Facilitated by the DINloop, multiple DIN Nodes in the core network easily form a Steiner tree for multicast traffic. Furthermore, traffic for different multicast groups sharing the same path are aggregated through a label stack. Simulations demonstrate that DINloop-based multicast results in less message load needed to form the multicast structure.