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PCE Communications Protocol Relationship to PCE Discovery PCE discovery mechanism/protocol not included as part of PCE communications protocol separate PCE discovery protocol/mechanism PCC MAY use information in PCE communications protocol derived from PCE discovery protocol/mechanism e.g., PCC may learn location of one or more PCEs from the discovery protocol/mechanism PCC can pick one PCE & start to exchange communication protocol messages with the PCE also, an operator MAY configure location of PCE for the PCC two methods not exclusive PCC may choose a desired PCE from what it learnt from PCE discovery or being configured |