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Detailed requirements 2/3 Discovery of backup PCEs A PCE may indicate a backup PCE to be used in case of failure This would ease the backup selection procedure Control of the Scope of Discovery, on a per PCE basis MUST allow controlling to which PCC or group of PCCs the information related to a PCE will be advertised All PCCs in a single IGP area, All PCCs in a single AS A set of one or more PCCs in a set of one or more ASs … MUST support discovery across areas and AS boundaries |