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OAM Requirements MS-PW OAM SHOULD be supported end-to-end across the network OAM activation/deactivation SHOULD be tied to MS-PW setup/tear down The MS-PW SHOULD support a Forward Defect Indicator (FDI) Single ended monitoring SHOULD be supported for both directions of the MS-PW MS-PW OAM SHOULD support switch over between 1:1 protected LSPs end-to-end End-end and segment-based In-band monitoring SHOULD be provided At the S-PE, defect notifications on the upstream segment of PWs must be propagated to the downstream PW segment All PE routers along the MS-PW MUST agree on a common PW OAM mechanism At the S-PE, defects on an PSN tunnel must be propagated to all PWs that utilize that particular PSN tunnel The directionality of defect notifications must be maintained across the S-PE The S-PE should be able to behave as a segment endpoint for PW OAM mechanisms The S-PE MUST be able to pass U-PE to U-PE PW OAM messages transparently |