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Framework and Information model for G.709 Optical Transport Network (OTN)

draft-ietf-ccamp-gmpls-g709-framework-06 draft-ietf-ccamp-otn-g709-info-model-03 Authors & Contributors CCAMP WG, IETF 83 rd Paris. Framework and Information model for G.709 Optical Transport Network (OTN). Draft Framework Changes from version .05 to .06 (1).

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Framework and Information model for G.709 Optical Transport Network (OTN)

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  1. draft-ietf-ccamp-gmpls-g709-framework-06 draft-ietf-ccamp-otn-g709-info-model-03 Authors & Contributors CCAMP WG, IETF 83rd Paris Framework and Information model for G.709 Optical Transport Network (OTN)

  2. Draft Framework Changes from version .05 to .06 (1) • Major change is related to the introduction of sub-chapter 5.5 with typical scenarios for backward compatibility. • A new Switching Type (OTN-TDM = 101) has been introduced to enable backward compatibility procedure • Refinement on signaling constrains for support of layer multiplexing hierarchy signaling • Need at both ends of a server LSP for support of specific client multiplexing/demultiplexing • Requirement to send adaptation information (e.g. hierarchical information and TSG) to select proper link for carrying specific client

  3. Draft Framework Changes from version .05 to .06 (2) • Signaling implication for Control of hitless adjustment of ODUflex • Indication of similarity with respect control of bandwidth increasing and decreasing as depicted in RFC 3209 • Routing implication for Control of hitless adjustment of ODUflex • Routing needs to know whether an ODU link can support hitless adjustment of ODUflex (GFP) and how much resources available for resizing • To do that a new signal type “ODUflex(GFP-F) resizable” indicating the support of the resizing for that link has been introduced.

  4. Draft INFO Changes from version .02 to .03 • Updated section 4.1 on Tributary slot granularity as discussed in Taipei meeting. • Chapter has been split into “data plane “ and “control plane” part. • A sub-chapter explaining payload type and tributary slot granularity relationship has been added.

  5. TSG and PT relationship (1) • Payload type is a one-byte in the OPUk OH able to indicate the composition of the OPUk signal. • When PT assumes 20/21 value, it is used to characterize the ODU multiplexing structure. • These two values together with OPUk type (k=1,2,3 or4), are able to discriminate how OPUk will be strucured (TS 1.25 or 2.5)

  6. ODUjk ODUjk ODUjk ODUjk TSG and PT relationship (2) OPUk structured at 1.25 Gb/s OPUk structured at 2.5 Gb/s TSG 1.25 OPU4 ODTUjk Client ODTUGk TSG 1.25 Client PT=21 ODTUk.TS OPUk (k=2.3) TSG 2.5 Client ODTUjk ODTUGk Client PT=20 ODTUjk TSG 1.25 OPU1

  7. Next steps • Authors think that both the drafts have reached a good levels of content and clarity. • Authors think drafts can be ready for last call

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