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Summary of Requirements Assumption: inter-domain TE LSPs traverse various domains with contiguous and hierarchical (stitched or nested) LSP architecture. Protection Object for inter-domain TE LSPs Segment Recovery Flags: used in domains with contiguous LSP architecture Link Type Flags: used in domains with hierarchical LSP architecture Must Support three recovery modes listed below. Per-Domain Recovery: Main Problem: How to assign Protection Class, when the ingress does not know LSP architecture in each domain. Requirements: New bit, indicating whether both Seg. Recov. Flags and Link Type Flag be considered or not in each domain. Domain border link failure recovery: Requirements: Support for SNCP within bundled TE-Link. Domain border node failure recovery: Requirements: Extension of new bit to clarify whether “in-place” or not recovery LSP for ASBR node failure |