66th IETF Montreal July 2006 Analysis of Inter-domain Label Switched Path (LSP) Recovery draft-takeda-ccamp-inter-domain-recovery-analysis-00.txt Tomonori Takeda (NTT) Yuichi Ikejiri (NTT Communications) Adrian Farrel (Old Dog Consulting) Jean-Philippe Vasseur (Cisco)

66th IETF Montreal July 2006 Summary Submitted to CCAMP WG, presented here for information (PCE is one solution candidate) 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 –GMPLS UNI/L1VPNs –MPLS over GMPLS

66th IETF Montreal July 2006 Key Technical Elements With or without confidentiality Per-domain path computation or inter- domain collaborative path computation Sequential path computation or simultaneous path computation By combining of above (and plus some) elements, list 12 schemes (in broad category)

66th IETF Montreal July 2006 Example1 Without confidentiality Per-domain path computation Sequential path computation  XRO Recovery LSP Working LSP Obtain RRO via Resv msg Copy RRO into XRO in Path msg

66th IETF Montreal July 2006 Example2 With confidentiality Inter-domain collaborative path computation Simultaneous path computation  Cookie or Encryption Recovery LSP Working LSP PCE Result of path computation (temporary cash) Partial path Query PCE for ERO expansion Return cash Partial path

66th IETF Montreal July 2006 Relevance to PCE WG Review the document Make sure use of PCE is correctly understood Authors are planning to respin the document, then ask for CCAMP WG document