Analysis of Interdomain Label Switched Path LSP Recovery drafttakedaccampinterdomainrecoveryanalysis

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Analysis of Inter-domain Label Switched Path
(LSP) Recoverydraft-takeda-ccamp-inter-domain-re
covery-analysis-01.txt

• Tomonori Takeda (NTT)
• Yuichi Ikejiri (NTT Communications)
• Adrian Farrel (Old Dog Consulting)
• Jean-Philippe Vasseur (Cisco)

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Summary

• The whole scope
• Framework and analysis of inter-domain MPLS/GMPLS
  TE LSP recovery techniques
• Based on existing inter-domain framework
• Specifically for this version
• End-to-end diversity
• Path computation and signaling aspects
• List of various schemes
• Use cases
• Inter-area/AS/Provider
• CE-CE LSP (e.g., GMPLS UNI/L1VPNs)
• MPLS over GMPLS

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Key Technical Elements

• With or without confidentiality
• Per-domain path computation or inter-domain
  collaborative path computation
• Sequential path computation or simultaneous path
  computation

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Major Changes

• Updates by incorporating changes of
  confidential-segment (draft-bradford-ccamp-path-ke
  y-ero-00 draft-bradford-pce-path-key-01)
• Cookie is now path key
• Encryption is gone
• Various nits
• Currently, the focus is end-to-end diversity only

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Summary of Schemes

• 12 possible schemes
• Various missing pieces in existing solutions

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Next Steps

• Further work on selecting one or two practical
  schemes
• Comparison of various schemes against objective
  functions?
• Document is getting in good shape
• Ask more feedback