1. Packet Optimized Optical Transport Solutions A Practical Design and Implementation Approach Marc Teichtahl marc.teichtahl@versatel.nl marct@layerthree.com

2. Packet Optimized Optical Transport Solutions Presentation overview Design overview Why packet rings ? Current designs Removing the transport layer DTP basics Robustness and resilience Aplanned case study

3. Packet Optimized Optical Transport Solutions Design Overview Design Brief “effect the migration from traditional transmission technologies to a next generation platform optimized for the transmission of purely packetized data”

4. Packet Optimized Optical Transport Solutions Why packet rings ? Reduction in capital expenditure No more SDH/SONET ADM’s More efficient use of bandwidth statistical multiplexing and spatial resuse Single management infrastructure

5. Packet Optimized Optical Transport Solutions Current Design OC-3 POS OC-3 POS ADM SDH Tributaries

6. Packet Optimized Optical Transport Solutions Whilst robust, this design tends to be inefficient when dealing with purely packetized data Dedicated protection time slots reserve half the ring at all times. Fixed size Point to Point circuits provisioned regardless of actual bandwidth use. Cost and complexity reduced as we remove transport layers from the network.```

7. Packet Optimized Optical Transport Solutions ADM Provisioned Circuit Working Protection

8. Packet Optimized Optical Transport Solutions Removing the transport layers Optical SONET ATM SONET ATM IP Lower Cost, Complexity, & Overhead Traditional IP Over ATM POS IP-OG Today Tomorrow

9. Packet Optimized Optical Transport Solutions DPT Basics Outer ring data Outer ring control Inner ring data Inner Ring Control

10. Packet Optimized Optical Transport Solutions 2 Rings - Inner and Outer Data and control in opposite directions Both fibers used concurrently Accelerated control propagation for adaptive bandwidth utilization and self-healing.

11. Packet Optimized Optical Transport Solutions Framing Utilizes SONET/SDH framing Runs over all key fiber transport technologies Dark Fiber WDM SONET/SDH point to point and ring

12. Packet Optimized Optical Transport Solutions Bandwidth Multiplication Spatial re-use - SRP Traditional ring technologies use source stripping. This is in efficient, SRP uses destination stripping. Destination stripping allows the destination node to remove the packet from the ring freeing up bandwidth on other non-related paths.

13. Packet Optimized Optical Transport Solutions Bandwidth Multiplication Dual Fiber Both fibers carry “working” traffic. This is unlike SONET which uses dedicated protection bandwidth. Implemented in an existing network DTP can yield 1:2 (x2) bandwidth multiplier.

14. Packet Optimized Optical Transport Solutions Bandwidth Multiplication Statistical Multiplexing No TDM and no provisioned circuits Provides for statistical over subscription Can handle elastic burst requirements

15. Packet Optimized Optical Transport Solutions Robustness and Resilience Intelligent Protection Switching (IPS) Proactive monitoring and and self-healing through standard SONET/SDH overhead bytes. 50ms self-healing layer 1 wrapping Protection switching hierarchy for multiple concurrent failures

16. Packet Optimized Optical Transport Solutions Robustness and Resilience Intelligent Protection Switching (IPS) Doesn’t rely on SONET overhead bytes allowing for use non-SONET infrastructure such as WDM 50ms IP restoration Multi-layer aware, the router can now see all 3 layers

17. Packet Optimized Optical Transport Solutions A planned case study 4 Phase implementation plan Single node SDH tributary Semi-Hybrid transport network Hybrid network Full DPT network

18. Packet Optimized Optical Transport Solutions Single node SDH tributary SDH DPT IP

19. Packet Optimized Optical Transport Solutions Semi-Hybrid transport network SDH DPT IP END TO END

20. Packet Optimized Optical Transport Solutions Hybrid network IP only

21. Packet Optimized Optical Transport Solutions Full DPT network IP ONLY END TO END TRANSPORT LAYER IS COMPLETELY TRANSPARENT OC-12

22. Packet Optimized Optical Transport Solutions Amsterdam Den Haag Rotterdam Antwerp Brussels OC-12

23. Packet Optimized Optical Transport Solutions Amsterdam Den Haag Rotterdam Antwerp Brussels OC-12 3 phase implementation Semi-hybrid trial Amsterdam -> Brussels Point to point Hybrid trial Amsterdam -> Brussels Loop Full DTP Full DTP loop

24. Packet Optimized Optical Transport Solutions Presentation available at ftp://ftp.layerthree.com/pub/nanog16.ppt email me marct@layerthree.com