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Details in design IP/DTM

Details in design IP/DTM. Mattias Holmlund Net Insight AB mattias.holmlund@netinsight.se. Outline. DTM IP over DTM Scalability DTM LAN Emulation. DTM. Dynamic synchronous Transfer Mode. DTM. Dynamic synchronous Transfer Mode Time Division Multiplexing 125 s frames 64 bit slots

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Details in design IP/DTM

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  1. Details in design IP/DTM Mattias Holmlund Net Insight AB mattias.holmlund@netinsight.se

  2. Outline • DTM • IP over DTM • Scalability • DTM LAN Emulation

  3. DTM Dynamic synchronous Transfer Mode

  4. DTM • Dynamic synchronous Transfer Mode • Time Division Multiplexing • 125 s frames • 64 bit slots • Connection Oriented • Unidirectional channels, n*512 kbps

  5. 1 Gbps -> 1900 slots/frame 2.5 Gbps -> 4800 slots/frame Control slots / Data slots DTM Multiplexing Format

  6. Switch Node Interconnection

  7. DTM Services • High bandwidth • Renegotiable CBR • Multicast • Low latency and jitter • Billing • Connection set-up time

  8. IP over DTM

  9. IP over DTM • Take IP characteristics into account • Use DTM to the maximum • Scale with DTM

  10. IP Characteristics Traffic trace from Fix-West, June 1997

  11. Logical IPOD Structure DTM

  12. Shortcut Establishment

  13. QoS flows High bandwidth flows (Multicast flows) When to establish shortcuts?

  14. MPOA vs. IPOD • Similar in principle • Both use NHRP • NHRP Caching • Differences ATM / DTM • MPOA based on LAN Emulation

  15. Scalability

  16. Scalability of DTM Simplicity! • No priority queuing • No data processing • No buffer overflows

  17. Scalability of IPOD • Relieve routers from • QoS flows • High bandwidth flows • Add routing resources when needed

  18. DLE DTM LAN Emulation

  19. DTM LAN Emulation (DLE) DTM

  20. IPOD and DLE

  21. DTM Renegotiated CBR Cost efficient, Scalable IP network with support for High bandwidth QoS Conclusions

  22. http://www.netinsight.se Mattias Holmlund mattias.holmlund@netinsight.se More Information

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