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Xihua Fu Qilei Wang Yuanlin Bao ZTE Corporation Ruiquan Jing Xiaoli Huo China Telecom

RSVP-TE Signaling Extension for Explicit Control of LSP Boundary in MRN/MLN draft-fuxh-ccamp-boundary-explicit-control-ext-03.txt. Xihua Fu Qilei Wang Yuanlin Bao ZTE Corporation Ruiquan Jing Xiaoli Huo China Telecom. Changes since last version.

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Xihua Fu Qilei Wang Yuanlin Bao ZTE Corporation Ruiquan Jing Xiaoli Huo China Telecom

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  1. RSVP-TE Signaling Extension for Explicit Control of LSP Boundary in MRN/MLN draft-fuxh-ccamp-boundary-explicit-control-ext-03.txt Xihua Fu Qilei Wang Yuanlin Bao ZTE Corporation Ruiquan Jing Xiaoli Huo China Telecom

  2. Changes since last version • Adding a boundaries determination mechanism • Refining requirement • Editorial changes

  3. Boundaries Determination Mechanism • Problem Statement • The boundary determination mechanism in [RFC4206] depends on the comparing of interface switching capabilities. • For TDM switching capability, the comparing of interface switching capabilities relies on the max LSP bandwidth of interface.

  4. Boundaries Determination Mechanism • Problem Statement • One interface in OTN network could support several ODUk signal types. The max LSP bandwidth makes no any sense to path computation entity. So the mechanism in [RFC4206] isn't applied to OTN multi-layer network. • For example, PCE don’t know which are the boundary nodes of FA-LSP (e.g., ODU1 or ODU2) for e2e ODU0 LSP based on [RFC4206]. • This document introduces a generic mechanism for MRN/MLN to determine the boundaries of FA-LSPs by using termination and switching capability from IGP database.

  5. Boundaries Determination Mechanism • Example: Node B and D support ODUj being mapped into ODUk (k>j). Interface IF-B and IF-D support ODUj switching capability (ODUj(S)) and ODUk termination capability (ODUk(T)). Interface within node C only supports ODUk switching capability. So Node B and D could be boundaries of ODUk FA-LSP for ODUj LSP.

  6. Boundaries Determination Mechanism • Example: Hybrid node B and D support PSC being mapping into ODUk (e.g., by GFP-F). Interface IF-B and IF-D support PSC switching capability (PSC(S)) and ODUk termination capability (ODUk(T)). Interface within node C only supports ODUk switching capability. So Node B and D could be boundaries of ODUk FA-LSP for PSC LSP.

  7. Next steps • Refine the document according to the feedback of meeting and mailing list.

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