PCE-initiated point-to-multipoint LSPs

The Path Computation Element Protocol (PCEP) functionality is extended to allow a stateful PCE to initiate, provision, and modify point-to-multipoint traffic engineering LSPs through a PCC. Currently, Junos OS supports only point-to-point PCE-initiated LSPs. With the introduction of point-to-multipoint PCE-initiated LSPs, a PCE can initiate and provision a point-to-multipoint LSP dynamically without the need for local LSP configuration on the PCC. The PCE can also control the timing and sequence of the point-to-multipoint path computations within and across (PCEP) sessions, thereby creating a dynamic network that is centrally controlled and deployed.