Computing point-to-multipoint paths

摘要

An apparatus comprising a path computation element (PCE) configured to communicate with a path computation client (PCC) and compute a point-to-multipoint (P2MP) path across an autonomous system (AS) domain. Also included is a network component comprising at least one processor configured to implement a method comprising obtaining a computation request for a P2MP path across a plurality of AS domains, attempting to calculate the P2MP path across the AS domains, thereby generating a computed path or a failure reason, and transmitting a reply comprising the computed path or an indication of the failure reason. Included is a method comprising exchanging a request message and a reply message about a P2MP path across an AS domain between a PCC and a PCE.

主权项

1. An apparatus comprising:
a path computation element (PCE) configured to:
receive a PCE path (PCEP) request message from a path computation client (PCC) in an area or an autonomous system (AS) domain, wherein the PCEP request message requests the addition of a plurality of destination addresses to an existing point-to-multipoint (P2MP) path, which traverses a plurality of nodes and crosses the area and a plurality of other areas, or the AS and a plurality of other AS domains, or both; andtransmit a PCEP reply message comprising a plurality of new branches to the P2MP path, wherein each branch extends to a leaf that corresponds to one of the destination addresses.