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draft-ietf-tcpm-newcwv-06

draft-ietf-tcpm-newcwv-06 . Gorry Fairhurst Raffaello Secchi Arjuna Sathiaseelaan TCPM WG IETF 90, Toronto, July 2014. Status of Internet draft. Several changes to the draft -06 after review: Terminology clarified (data-limited concept) Specified what is in-scope and out-of-scope

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draft-ietf-tcpm-newcwv-06

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  1. draft-ietf-tcpm-newcwv-06 GorryFairhurst RaffaelloSecchi ArjunaSathiaseelaan TCPM WG IETF 90, Toronto, July 2014

  2. Status of Internet draft • Several changes to the draft -06 after review: • Terminology clarified (data-limited concept) • Specified what is in-scope and out-of-scope • new-CWV is more conservative than standard TCP in reducing cwnd after loss • Clarified differences between PipeACK and FlightSize • No changes to the method • WG Chairs changed intended status to “Experimental “ pending experience with deployed implementations

  3. Status of NewCWV implementation • New Linux kernel patch (R Secchi) • Linux kernel 3.14 • Interoperable with other CC schemes • Fixes cases when congestion is local • Patch for Free BSD under review (T Jones) • Patch freedbsd-net (30/6/2014) • Bug 191520

  4. Example experiments withdata-limited flow: 427 kb/s VBR Flow The flow is NOT paced TCP Reno TCP Cubic Path characteristics: Bottleneck capacity = 1 Mb/s Bottleneck buffer latency = 200ms (18 MSSs) Round-trip propagation delay = 100ms

  5. Example experiments with data-limited flow: • 427 kb/s VBR Flow The flow is paced: Linux FQ scheduler TCP Reno TCP Cubic Path characteristics: Bottleneck capacity = 1 Mb/s Bottleneck buffer latency = 200ms (18 MSSs) Round-trip propagation delay = 100ms

  6. Current Plans • Using new-cwv in our labs • Feedback on implementations welcome • Comments on draft welcome

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