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Summary of PCECP Requirements Support of P2MP paths (!) Indication of P2MP Path Computation Request Non-Support of P2MP Path Computation Error response Backward compatible Specification of multiple destinations Response to contain P2MP Paths Multi-Message Requests and Responses P2MP computation requests and response may be large An RFC4657 requirement Non-Specification of Per-Destination Constraints and Parameters All constraints, traffic parameters, and QoS MUST apply to whole tree Path Modification and Path Diversity Same as for P2P in RFC4657, but note that P2MP is hard and requires lots of data Reoptimization of P2MP TE LSPs Cost/benefit, sub-tree limit, sub-tree response Addition and Removal of Destinations from Existing Paths A subset of path modification, but may cause significant reoptimization Capabilities Exchange Discovery through PCE discovery or through PCEP |