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Framework for GMPLS and PCE Control of G.709 Optical Transport Networks

Framework for GMPLS and PCE Control of G.709 Optical Transport Networks. CCAMP WG, IETF 80th, Prague, Czech Republic draft-ietf-ccamp-gmpls-g709-framework-04.txt. Fatai Zhang (zhangfatai@huawei.com) Dan Li (huawei.danli@huawei.com) Han Li (lihan@chinamobile.com)

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Framework for GMPLS and PCE Control of G.709 Optical Transport Networks

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  1. Framework for GMPLS and PCE Control of G.709 Optical Transport Networks CCAMP WG, IETF 80th, Prague, Czech Republic draft-ietf-ccamp-gmpls-g709-framework-04.txt Fatai Zhang (zhangfatai@huawei.com) Dan Li (huawei.danli@huawei.com) Han Li (lihan@chinamobile.com) Sergio Belotti (sergio.belotti@alcatel-lucent.it) Daniele Ceccarelli (daniele.ceccarelli@ericsson.com)

  2. Contents of this Draft • Informative overview of the OTN tech • Connection management in OTN • GMPLS and PCE requirements • Hierarchy LSP in OTN • GMPLS Signaling extension requirements • GMPLS Routing extension requirements • GMPLS LMP extension requirements • PCEP requirements

  3. Changes from Version 03 • Refined the description of LSP hierarchy in ODU layers • The term “multi-stage multiplexing” has been replaced by “multiplexing hierarchy” • Refined the text to describe FA creation approaches • Added a new requirement about VCAT & LCAS • Refined the routing requirements • Refined the discovering requirements

  4. Multiplexing Hierarchy • Replaced “multi-stage multiplexing” by “multiplexing hierarchy” • Suggested by some experts during off-line discussion in IETF 79th, Beijing • Creation of multiplexing hierarchy using FA mechanism • The ODU2 FA can be pre-provisioned (e.g., based on network planning) • The ODU2 FA can also be triggered by the signaling for the ODU0 connection • The resource of the ODU2 FA can be advertised in the network • Consistent with the existing GMPLS MLN control model (ie., H-LSP) ODU0 Connection ODU2 FA ODU3 Link ODU3 Link A B C D E

  5. Support for VCAT & LCAS • G.709 V3 supports Virtual concatenation of OPUk (OPUk-Xv, k=1,2,3 and X=1 .. 256) and LCAS for virtual concatenation (referring to G.7042) • VCAT for OPU0, 2e, 4 and OPUflex is NOT supported by [G.709V3] • [RFC4328] supports control of VCAT for ODU1/2/3 • [draft-ietf-ccamp-gmpls-vcat-lcas] has a clear description of VCAT and LCAS control in both SONET/SDH and OTN networks

  6. Refining Routing / Discovery Requirements • Routing aspects • The requirement of advertising the TS granularity of the link has been removed because it’s not necessary • Declare “how many LO ODUs can be supported” • TS granularity could be negotiated through HW or LMP, so it can allocate TS correctly when connection establishment • Changed the description of “link multiplexing capacity and link rate capacity” into “terminating and switching capability” • Discovery aspect • Correlating the supported LO ODU signal types as well as multiplexing hierarchy capability at both ends of the link

  7. Next Steps • Refine the document by monitoring the progress of OTN data plane tech • Keep consistent with [OTN-Info] and protocol drafts • Refine the draft based on the feedback from the meeting or mailing list

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