Building multipoint-to-multipoint label switch paths

The present invention discloses a multi-multipoint label switched path, such as the proposed use of Multiprotocol Label Switching (MPLS) protocol like to create, maintain and use a multi-provider network multipoint label switched path (LSP) . Multipoint to multipoint LSP allow bidirectional multicast-type transmission provider network core routers, the multi-multipoint LSP is part of the core network through the router is configured to not only the uplink data interface associated with the upstream label Union, will each downstream interface uplink state uplink tag associated to provide.