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Problem Statement A PCC may have to be aware of a potentially large number of PCEs PCEs with distinct capabilities, PCE load balancing, redundancy, PCEs in adjacent domains Manual PCE configuration may have some limitations A Potentially huge configuration overhead on each PCC No discovery of a change in PCE capabilities or that a PCE is no longer alive Hence a mechanism allowing for Automatic and Dynamic PCE discovery is highly required Note: No distinction between PCE discovery by PCC or by PCE A PCE that has to request a path of another PCE can be considered as a PCC |