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OSPF-TE extensions for GMPLS Control of Evolutive G.709 OTN

draft-ceccarelli-ccamp-gmpls-ospf-g709-01 CCAMP WG, IETF 77 th Anaheim. OSPF-TE extensions for GMPLS Control of Evolutive G.709 OTN. Agenda. OTN TE info needed for ODU path computation WSON TE info out of scope

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OSPF-TE extensions for GMPLS Control of Evolutive G.709 OTN

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  1. draft-ceccarelli-ccamp-gmpls-ospf-g709-01 CCAMP WG, IETF 77th Anaheim OSPF-TE extensions for GMPLS Control of Evolutive G.709 OTN

  2. Agenda OTN TE info needed for ODU path computation WSON TE info out of scope Common interest to assure OSPF-TE routing extensions fully support OTN-G.709(2009) capabilities. Requirements Detail of routing specific requirements from OTN FWK Actual solution Being refined Next Steps

  3. Requirements • Possibility of bundling links either at the same line rate or different line rates (e.g. 40G and 10G link total bandwidth) • Bundling links at the same rate makes the calculation for ODU-flex routes slightly more precise while bundling links at different rates makes the control plane more scalable. • The choice of the method is implementation dependent • Support priority for restoration. • IETF requires supporting resource allocation at up to 8 priority levels. • Support any ODUs and ODU-flex • Differently from other containers (that have a fixed size) it is needed to declare the maximum LSP bandwidth and the maximum number of LSPs that can be supported using this bandwidth. • Concurrent path computation for ODUk and ODUflex 32 TS A B 24 TS 24 TS Example: 3-odu3 – Max Band 32TS – Unres 80

  4. Requirements • Differentiate multiplexed capacity from line rate capacity • Need not to lock connection service rate to infrastructure rate. • Perform accurate route calculation for containers that use a different number of time slot depending from the server rate. • E.g. ODU2e

  5. Solution - 1 • New ISCD • Max LSP Bandwidth and Unreserved bandwidth per priority • Flags for multiplexing capability declaration • 1 ISCD per component links with same line rate and multiplexing capability • Drawbacks • Bundling of component links with same OD(T)Uk and signal flags • Concurrent path computation • Example: 3-odu3 – Max Band 32TS – Unres 80 How many service connections can be supported? 1 or 2?!?! 32 TS A B 24 TS 24 TS

  6. Next steps • Follow latest progresses on G.709 • Progress the joint work aiming at finding a solution respecting all the requirements • New draft after the meeting

  7. QUESTIONS ? THANK YOU

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