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Ethernet Protection and Packet Synchronization

Joint IEEE-SA and ITU Workshop on. Ethernet Protection and Packet Synchronization. http://www.itu.int/en/ITU-T/Workshops-and-Seminars/ethernet/201307/Pages/default.aspx. Moderator Summary Ethernet Protection Summary. Ghani Abbas, Ericsson – ITU-T SG15 vice chair

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Ethernet Protection and Packet Synchronization

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  1. Joint IEEE-SA and ITU Workshop on Ethernet Protection and Packet Synchronization http://www.itu.int/en/ITU-T/Workshops-and-Seminars/ethernet/201307/Pages/default.aspx

  2. Moderator SummaryEthernet Protection Summary Ghani Abbas, Ericsson – ITU-T SG15 vice chair Steve Haddock – IEEE 802.1 Interworking chair Glenn Parsons, Ericsson – IEEE 802.1 vice chair Joint IEEE-SA and ITU Workshop on Ethernet Geneva, Switzerland, 13 July 2013

  3. Summary ….. 1/2 • IEEE 802.1AX LAG is being revised to provide node and link redundancy, address dual-homed interconnects, and congruent per-service traffic distribution. Expected Standards 1H2014 • New Project p802.1CB started to identify and replicate frames and eliminate these frames in seamless protection scheme • New project p802.1 Qca -Path Control and Reservation (PCR) started. It leverages SPB for explicit Path establishment as well as reservation and redundancy

  4. Summary …..2/2 • G.Supplement 52 for G.8032 was approved. It provides scenarios for: - Ethernet services support - Ring interconnections • Network applications and use cases • New work G.mdsp provides protection interworking for UNI/NNI network scenarios using ITU approved protection schemes (OTN and Ethernet) • MECP is under study. It addresses protection of single rooted-multipoint (RMP) Ethernet connections in Ethernet transport networks.

  5. Moderator SummaryPacket Synchronization Jean-Loup Farrant – ITU-T SG15 Q13 rapporteur Michael Johas Teener – IEEE 802.1 TSN chair Joint IEEE-SA and ITU Workshop on Ethernet Geneva, Switzerland, 13 July 2013

  6. Overview of Q13 recommendations G.8260 (Definition) Definitions /terminology Agreed Ongoing G.8260 AppI (metrics) Frequency: G.826x Time/Phase:G.827x G.8261 G.8271 Basics SyncE Jitter-Wander: (Included in G.8261) G.8271.1(Network limits_time/phase Network requirements G.8261.1(NetwkPDV_frequency) G.8271.2(profile2) 73.1 GM G.8262 (SyncE) G.8272PRTC 73.2 BC Clock G.8273 G.8263 (slave clock) 73.3 TC 73. x,y,z G.8264(SyncE-architecture-SSM) Methods G.8275(architecture-time) G.8265(architecture-Frequency) G.8265.1(PTPprofileFrequency) G.8275.1(PTPprofile1Time/phase) Profiles G.8275.2(PTPprofile2Time/phase ) G.8265.m(PTP Profile frequency m) 6 Geneva, Switzerland, 13 July 2013 G.supp

  7. Summary of the Synchronization sessions -1 • IEEE 1588 Revision • Fix existing problems, remove inconsistancies • Improve accuracy, security, configuration and MIBs • Layered architecture, but backwards compatible • Backward compatibility is very important for operators • IEEE 802.1AS Revision • Additional link types, link aggregation • Redundancy and faster reconfiguration • Architectural convergence with 1588 7 Geneva, Switzerland,13 July 2013

  8. Summary of the Synchronization sessions -2 3 • IEEE Issue One stepclock • One-step clockimplies the implementation of hardware thatgreatlyreduces the processor requirements for synch and delayprocessing • Backwards compatibility a requirement • IEEE 1588 simulations for G.827x & 802.1AS • The proposed G.827x and 802.1AS profiles willmeettheir goals • Partial support still to beperformed in ITU 8 Geneva, Switzerland,13 July 2013

  9. Summary of the Synchronization sessions -3 • Network limits-Asymmetry Asymmetry remains one of the main issues in the transport of time. Partial support might add new sources of asymmetry • Synchronization network architecture • Key aspects of NGN synchronization • Packet network infrastructure • New synchronization requirements • New methods • New clock structures • Architecture helps see how all pieces fit together 9 Geneva, Switzerland,13 July 2013

  10. Summary of the Synchronization sessions - 4 • 802.1Q Stream reservation protocol • deterministic operation requires that resources are available • based on 802.1Q Multiple Registration Protocol • talkers advertise the streams that they can source • Important side-effect sets up a reservation « domain » • listeners register for streams • New work under way • static reservations, faster startup, big reduction in packet traffic, support for new shapers, more management 10 Geneva, Switzerland,13 July 2013

  11. Summary of the Synchronization sessions - 5 • 802.1Qbv scheduled traffic • Scheduling stream transmission can greatly reduce delays through switches • Cut-through makes sense • Management of schedule is not a plug-and-play operation, it will require intelligence 11 Geneva, Switzerland,13 July 2013

  12. Summary of the Synchronization sessions -6 • G.8275.x profiles • G.8275.x time PTP telecom profiles are designed to support the needs of current and future mobile technologies • G.8275.1 (full timing suport) will be finalized soon, G.8275.2 (partial timing support) is just starting 12 Geneva, Switzerland,13 July 2013

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